Rain Gauge Replacement Tube: How to Find the Right Fit
A cracked, yellowed, or missing rain gauge tube does not mean you need a new rain gauge. In most cases a direct replacement tube costs less than $15 and takes under five minutes to fit. The problem is finding the right one. Rain gauge tubes are not universal — the wrong diameter, the wrong height, or the wrong opening size will give you inaccurate readings or simply will not fit at all.
This guide covers everything you need: how to measure your existing tube so you order the correct replacement, the difference between glass and plastic, the best options currently available on Amazon, a full compatibility guide by brand, and a step-by-step replacement walkthrough.
To find the right rain gauge replacement tube, measure three things on your existing tube: total height (typically 5 or 7 inches), opening diameter at the top (typically 1.5 or 2.24 inches), and tube body diameter. Match all three to a replacement. Plastic tubes are more affordable and freeze-resistant. Glass tubes offer better long-term clarity. Replace when the tube is cracked, yellowed, or reading significantly differently from nearby official stations.
- What is a rain gauge replacement tube?
- When to replace your rain gauge tube
- How to measure for the right replacement
- Best rain gauge replacement tubes
- Glass vs plastic: which is better?
- Which tube is right for you?
- Compatibility guide by brand
- How to replace a rain gauge tube
- Final recommendations by buyer type
- Frequently asked questions
What Is a Rain Gauge Replacement Tube?
A rain gauge replacement tube is the cylindrical container that sits inside or forms the body of a rain gauge, collecting rainfall and displaying the measurement on a printed or etched scale. It is the component most likely to need replacing over the life of a rain gauge because it is always exposed to the elements: UV light degrades plastic, freezing temperatures can crack both glass and plastic, and physical impact from lawn mowers, falling branches, or hail can chip or shatter the tube entirely.
The tube is separate from the rain gauge housing, mounting bracket, and funnel collector, all of which typically outlast the tube itself. Replacing just the tube is always more economical than replacing the entire gauge.
Why do rain gauge tubes crack or fail?
- Freeze-thaw cycling: Water expands approximately 9 percent when it freezes. A tube left full of water through a hard freeze will crack from internal pressure, whether plastic or glass.
- UV degradation: Standard plastic becomes brittle and yellowed after prolonged sun exposure, typically within 2 to 5 years depending on climate.
- Physical impact: Glass tubes are vulnerable to impact from lawn equipment, hail, or accidental drops. Thin plastic tubes can also crack on impact in cold weather.
- Mineral scaling: Hard water deposits build up inside the tube over time, obscuring the measurement scale and reducing reading accuracy.
When to Replace Your Rain Gauge Tube
Replace your rain gauge tube when you notice any of the following:
| Symptom | What it means | Action |
|---|---|---|
| Visible cracks or chips | Tube is compromised and leaking | Replace immediately |
| Yellowing or cloudy plastic | UV degradation making scale hard to read | Replace for accuracy |
| Scale markings faded | Printed scale worn away | Replace for accuracy |
| Readings differ significantly from official data | Tube deformation or scaling affecting volume | Clean first, then replace if readings remain off |
| Mineral deposits inside tube | Hard water scaling | Clean with vinegar solution first |
| Tube missing entirely | Lost or broken | Measure housing before ordering |
How to Measure for the Right Replacement Tube
Getting the measurements right before ordering is the single most important step. A tube that is the right height but the wrong diameter will either not fit the housing or produce inaccurate readings because the scale is calibrated to a specific tube volume. The World Meteorological Organisation specifies that a rain gauge collector opening must be a fixed, known diameter precisely because the rainfall calculation depends entirely on that measurement.
Measure from the base of the tube to the top of the lip. Most standard tubes are 5 inches or 7 inches. This determines the maximum rainfall the tube can record before overflowing.
Measure the inner diameter of the opening at the very top of the tube. Standard openings are typically 1.5 inches or 2.24 inches. This must match exactly for accuracy.
Measure the outer diameter of the tube body. This must fit inside your rain gauge housing or mounting bracket. Typically 0.75 to 1.25 inches for standard gauges.
Check whether your tube sits inside a housing, clips into a bracket, or mounts on a post. Some replacement tubes include mounting hardware, others do not.
Common rain gauge tube sizes
| Size | Opening Diameter | Best for |
|---|---|---|
| 5 inch | 1.5 in or 2.0 in | Most residential gardens, moderate rainfall climates |
| 7 inch | 1.5 in or 2.24 in | High-rainfall regions, infrequent checking |
| 8 inch+ | 2.0 in or larger | Professional monitoring, heavy precipitation areas |
Best Rain Gauge Replacement Tubes
| Product | Material | Height | Pack | Best For |
|---|---|---|---|---|
| JMBay with Brush | Plastic | 7″ | 2-pack | Best overall — any climate |
| Clear Glass 2.24″ Opening | Glass | 7″ | Single | Best glass — mild climates |
| Thick Plastic with Brush | Thick Plastic | 7″ | Single | Best for cold climates |
| 5″ Thick Plastic with Brush | Thick Plastic | 5″ | Single | Best budget — 5″ gauges |
| JOYBee Glass 2-Pack | Glass | 7″ | 2-pack | Best glass with spare included |
| 5″ Kit with Stainless Rack | Glass | 5″ | 2-pack + rack | Best complete replacement kit |
Common buying mistakes to avoid
| Mistake | Why it matters | How to avoid it |
|---|---|---|
| Ordering by height only | A 7-inch tube with the wrong opening diameter will give inaccurate readings | Always measure all three dimensions: height, opening diameter, and body diameter |
| Ignoring opening diameter | The scale is calibrated to a specific opening size — wrong diameter means wrong readings | Measure the inner diameter of the top opening on your existing tube |
| Assuming universal fit | Rain gauge tubes are not universal — brands and models use different sizes | Measure your existing tube or housing before ordering |
| Choosing glass in a cold climate | Glass cracks when water inside it freezes | Choose freeze-resistant plastic if temperatures drop below 32°F (0°C) |
| Forgetting to check body diameter | A tube that fits the opening but not the housing cannot be installed | Measure the outer diameter of your existing tube body |
All six products below are currently available on Amazon with strong review histories. Each has been selected for a specific use case based on material, size, price, and compatibility.
The JMBay 7-inch plastic tube is the most practical all-around choice for most home rain gauges. The 2-pack gives you a spare for the season, the included cleaning brush handles mineral deposits, and the freeze-proof plastic resists cracking in cold weather far better than glass. The measurement scale is clear and easy to read at distance. Compatible with most standard garden rain gauges that use a 7-inch tube body.
- 2-pack value at low price
- Freeze-proof and crack-resistant
- Cleaning brush included
- Clear scale markings
- Lightweight and easy to handle
- Plastic may yellow over 3-5 years
- Not glass — less premium look
- 7-inch only — no 5-inch option in this listing
Best for: Most home gardeners who want a reliable, affordable replacement that works in any climate.
Check Price on Amazon As an Amazon Associate we earn from qualifying purchases at no extra cost to you.For those who prefer glass, this 7-inch clear glass tube with a 2.24-inch opening delivers superior long-term clarity and a premium feel. Glass does not yellow, does not absorb mineral deposits as readily as plastic, and the measurement scale stays readable for many more years. The 2.24-inch opening is a common standard size that fits a wide range of garden rain gauge housings.
- Glass stays clear indefinitely
- Premium look and feel
- Easy to read scale
- Resists mineral staining better than plastic
- Will crack if left full in a hard freeze
- Heavier and more fragile than plastic
- Single unit — no spare included
Best for: Gardeners in mild climates who want a long-lasting premium glass tube and empty their gauge regularly.
Check Price on Amazon As an Amazon Associate we earn from qualifying purchases at no extra cost to you.This thicker-walled plastic tube is designed specifically for durability in cold and wet climates. The extra wall thickness reduces the risk of cracking on impact and improves resistance to freeze-thaw cycling compared to standard thin-wall plastic tubes. Cleaning brush included. A practical choice if you live in a climate that sees hard winters or frequent hail.
- Thicker walls than standard plastic
- Cold and crack resistant
- Cleaning brush included
- Good value single unit
- Single unit — no spare
- Slightly heavier than standard plastic
Best for: Cold climate gardeners who want the most durable plastic tube option for harsh winters.
Check Price on Amazon As an Amazon Associate we earn from qualifying purchases at no extra cost to you.The 5-inch version of the thick plastic tube is the budget choice for most standard residential rain gauges. If your existing gauge takes a 5-inch tube, this is a cost-effective replacement that does not compromise on durability. Includes a cleaning brush. Suitable for most moderate climates where rainfall rarely exceeds 5 inches between readings.
- Most affordable option
- Thick walls for durability
- Cleaning brush included
- Fits standard 5-inch housings
- 5-inch max capacity only
- Single unit
- Not suitable for high-rainfall regions
Best for: Budget-conscious buyers with standard 5-inch rain gauges in moderate climates.
Check Price on Amazon As an Amazon Associate we earn from qualifying purchases at no extra cost to you.The JOYBee 2-pack glass option is the best value for glass tube buyers. Getting two glass tubes at once means you always have a spare when the inevitable happens — whether a hard freeze, a hailstorm, or an accidental knock. Standard 7-inch size fits most mid-size garden rain gauges. Both tubes include clear, easy-to-read measurement markings.
- Glass clarity and longevity
- 2-pack gives you a spare
- Good value for glass
- Standard 7-inch size
- Glass — vulnerable to freezing if left full
- More fragile than plastic on impact
Best for: Glass tube buyers who want a spare on hand and live in a mild-to-moderate climate.
Check Price on Amazon As an Amazon Associate we earn from qualifying purchases at no extra cost to you.This set includes a stainless steel post-mounting rack alongside two glass replacement tubes, making it the complete solution for those who also need a new mounting system. The stainless steel rack outlasts plastic mounting brackets significantly and the included glass tubes give you an immediate working setup. Ideal when both the tube and the mounting have deteriorated.
- Complete solution: tubes and mounting rack
- Stainless steel rack is highly durable
- 2 glass tubes included
- Post-mount design suits open garden locations
- 5-inch capacity only
- Glass tubes need winter care in cold climates
- Higher price than tube-only options
Best for: Buyers who need both a new mounting solution and replacement tubes in one purchase.
Check Price on Amazon As an Amazon Associate we earn from qualifying purchases at no extra cost to you.Glass vs Plastic Rain Gauge Tubes: Which Is Better?
Neither glass nor plastic is universally better. The right choice depends on your climate, how often you check your gauge, and how much you care about long-term appearance.
| Feature | Glass | Plastic |
|---|---|---|
| Clarity over time | Stays clear indefinitely | Yellows after 2 to 5 years |
| Freeze resistance | Cracks if left full in a freeze | Flex-resistant plastic survives better |
| Impact resistance | Shatters on hard impact | Flexes rather than shatters |
| Mineral deposits | Easier to clean, less absorption | Can absorb staining over time |
| Weight | Heavier | Lighter |
| Cost | Slightly higher | Lower |
| Lifespan | Indefinite if protected | 2 to 5 years typically |
| Best climate | Mild (no hard freezes) | Any climate |
Rain Gauge Replacement Tube Compatibility Guide by Brand
Most rain gauge manufacturers do not publish detailed tube specifications in consumer-facing documentation, which is why finding a compatible replacement often requires measuring the original. The table below provides general guidance based on commonly known specifications for the most popular brands.
| Brand | Typical Tube Height | Typical Opening Diameter | Notes |
|---|---|---|---|
| AcuRite | 5 inch or 7 inch | 1.5 in or 2.24 in | AcuRite sells official replacement tubes directly. Check model number on base. |
| La Crosse Technology | 5 inch or 7 inch | 1.5 in or 2.0 in | La Crosse replacement parts available via their website and Amazon. |
| Ambient Weather | 7 inch | 2.24 in | Most Ambient gauge housings take standard 7-inch tubes with 2.24-inch opening. |
| Taylor | 5 inch | 1.5 in | Standard 5-inch tubes typically compatible. Check housing inner diameter. |
| Evergreen Garden | 7 inch | 1.5 in | Standard 7-inch plastic tubes generally compatible with Evergreen housings. |
| Toland | 7 inch | 2.0 in | Decorative gauges may vary. Measure housing inner diameter carefully. |
| Davis Instruments | Tipping bucket (no tube) | N/A | Davis weather stations use tipping bucket rain gauges — no replacement tube required. See Davis replacement parts guide. |
| Ecowitt | Tipping bucket (no tube) | N/A | Ecowitt stations use tipping bucket rain gauges — no replacement tube required. |
How to Replace a Rain Gauge Tube
Replacing a rain gauge tube is straightforward. The process takes under five minutes for most standard gauges.
Pour out any water remaining in the gauge. Lift or unclip the existing tube from the housing or mounting bracket. On most standard gauges the tube simply lifts out. Some models use a small retaining clip at the base.
Before fitting the new tube, rinse the rain gauge housing and funnel with clean water. Remove any debris, insects, or mineral deposits that may have accumulated. A clean housing ensures the new tube sits correctly and reads accurately from day one.
Lower the new tube into the housing slowly. It should fit snugly without forcing. The tube body should not rattle or wobble, and the opening at the top should align with the funnel above it. If it does not fit, measure again and compare against the product listing.
Press the tube firmly into position. Then check that the entire rain gauge is level using a spirit level or the built-in level indicator if your gauge has one. An unlevel gauge causes water to pool to one side of the tube, producing consistently inaccurate readings.
Pour exactly 1 inch worth of water through the funnel (calculate the volume based on your funnel diameter) and verify the reading on the new tube matches. This confirms the tube is compatible and reading correctly. Compare with nearby official station data after the next real rainfall event.
Final Recommendations by Buyer Type
Freeze-resistant plastic and a spare tube included. Best choice where temperatures drop below freezing regularly.
Glass stays clear for years without yellowing. Choose glass if you never experience hard freezes.
Most affordable option. Thick walls add durability. Good for standard 5-inch gauges in moderate climates.
Glass quality with a spare included. Best value for glass buyers who want peace of mind.
7-inch capacity handles higher rainfall before overflowing. Check less often without missing data.
Complete replacement kit including a durable stainless steel post-mount bracket and two glass tubes. No separate purchases needed.
Which Replacement Tube Is Right for You?
Not sure which tube to choose? Follow this quick decision guide:
Frequently Asked Questions
Are rain gauge replacement tubes universal?
No. Rain gauge replacement tubes are not universal. The critical dimensions are opening diameter and total height. Most standard gauges use either a 5-inch or 7-inch tube with a 1.5-inch or 2.24-inch opening. Always measure your existing tube before ordering to confirm compatibility with your housing.
What size rain gauge replacement tube do I need?
Measure the height, opening diameter, and body diameter of your existing tube. Most standard garden rain gauges use a 5-inch or 7-inch tube. The opening diameter is typically 1.5 inches or 2.24 inches. Match all three measurements to find a compatible replacement.
Can I use a larger tube in my rain gauge?
Not without affecting accuracy. The measurement scale is calibrated to a specific opening diameter and tube volume. A different opening diameter changes the rainfall-to-reading ratio. Always replace with the same diameter tube to maintain accurate measurements.
Do plastic rain gauge tubes yellow over time?
Yes. Standard plastic yellows and becomes cloudy after prolonged UV exposure, typically within 2 to 5 years. UV-resistant or polycarbonate tubes resist yellowing longer. Glass tubes do not yellow but can crack in freezing temperatures if left full of water.
Can glass rain gauge tubes crack in winter?
Yes, if water is left inside and freezes. Water expands approximately 9 percent when frozen, which is enough to crack most glass tubes from the inside. Empty the tube before the first frost of the season or bring it indoors for winter. Plastic freeze-proof tubes are the practical alternative for cold climates.
How do I clean a rain gauge tube?
Rinse with clean water after each significant rainfall. For mineral deposits and algae, soak in one part white vinegar to three parts water for 30 minutes, scrub with a thin cleaning brush, then rinse thoroughly. Most replacement tubes include a cleaning brush for this purpose.
How often should I replace my rain gauge tube?
Replace when you see visible cracks, yellowing that obscures the scale, or significant differences between your readings and nearby official station data. Most plastic tubes last 2 to 5 years outdoors. Glass tubes can last indefinitely if protected from freezing and physical impact.
What is the difference between a 5-inch and 7-inch rain gauge tube?
The measurement refers to total height, which determines maximum recording capacity. A 5-inch tube records up to 5 inches of rainfall before overflowing. A 7-inch tube records up to 7 inches. For most residential use in moderate climates, 5 inches is sufficient. In high-rainfall regions or if you check infrequently, choose a 7-inch tube.
Sources
Product specifications from manufacturer listings on Amazon. Rain gauge calibration principles from the World Meteorological Organisation Guide to Meteorological Instruments and Methods of Observation. Freeze-expansion physics from standard materials science references. No manufacturer compensation was received. As an Amazon Associate we earn from qualifying purchases.
Lena Thornton
Weather Station Analyst and CWOP Contributor. Lena has researched, reviewed and analysed weather stations and instruments for over a decade. She contributes observation data to the Citizen Weather Observer Program (CWOP) and writes exclusively for the-weather.com.