Name: iSpring 20-Gallon Vertical Well Pressure Tank
Brand: iSpring
SKU: 1002853150
Price: 185.99 USD
Availability: InStock
Rating: 4.6 (41 reviews)

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iSpring pre-pressurized tanks are perfect for use in whole house water storage with your reverse osmosis system or other water filtration system. The water filtration process is on the slower side, so a pressurized storage tank is typically required to supply water from the system on demand. Your water filtration system will fill the tank to capacity, and when you open your water dispenser, the water is sent out by the tank's pressurized air bladder.

20 Gallon tank with 14 Gallon storage capacity, tested by independent third-party to meet NSF/ANSI standard
Tank connector and shut-off valve included. shut-off valve connects to 3/8-in tubing
Made from FDA listed, food grade materials, specially designed for reverse osmosis application
Working pressure from 30psi to 100psi
How Can We Help? Text us now! (678)261-7611 Call Only M-F 9-5 EST , (470)560-0012 Text Only M-F 9-5 EST

General
Color/Finish Family	White	Material	Steel
Tank Type	Vertical

Dimensions
Thread Size Measurement	3/8-in	Tank Capacity (Gallons)	20
Height (Inches)	30.5	Weight (When Empty) (lbs.)	30
Tank Discharge Size (Inches)	0	Thread Size (Inches)	.375
Diameter (Inches)	16

Features
Pressure Relief Valve	No

Certifications
CA Residents: Prop 65 Warning(s)	No

Warranty
Warranty	30-day

Miscellaneous
UNSPSC	24111800

Check out the Best Selling Pressure Tanks on Lowes.com

Review

4.6 out of 5

41 Reviews

3 Star

2 Star

93% Recommend this product

Ratings may include incentivized customer reviews.

41 Customer Reviews

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Excellent Product

Would Recommend

Excellent tank, sturdy design and large capacity.

Ronald CSeptember 3, 2026
From 5.5-Gallon Vertical Well Pressure Tank Verified Purchaser

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Extended Warranty Registration

Would Recommend

Activation of the complimentary 3 year warranty was quick and easy. Sean at sales@ispringfilter.com processed my application online without issue. Thank you, Sean.

AndyAugust 23, 2026

Was this Review Helpful ?

Great Customer Support

Would Recommend

Jonathan handled my issue very professionally and resolved the problem very concisely. I was very appreciative for the resolution and he is a credit toIspring.

Cudaman1965August 11, 2026
From 3.2-Gallon Vertical Well Pressure Tank

Was this Review Helpful ?

T20M

Would Recommend

The T20M is a nice upgrade from the 5 gallon tank. It does not provide more pressure at the faucet but you do get constant normal pressure for a much longer time. Mine arrived with a small dent on the side towards the top that doesn’t affect anything but I was still a little disappointed that it was dented coming straight from ispring. I also tried to sign up for the warranty but their website is trash. I can’t even upload a photo of the dent on this review

TimJuly 20, 2026

From iSpring Water Systems

Best choice

Would Recommend

Great price and works excellent

NachoMay 11, 2026
From 3.2-Gallon Vertical Well Pressure Tank Verified Purchaser

Was this Review Helpful ?

I Spring Storage Tank

Would Recommend

This tank is used for my Reverse Osmosis System. I am pleased with the tank and the company. When I had a question, "Sean" answered almost immediately. You won't go wrong here.

LeslieSeptember 4, 2025
From 3.2-Gallon Vertical Well Pressure Tank

https://photos-us.bazaarvoice.com/photo/2/cGhvdG86bG93ZXM/fa587a2b-dfe7-5093-a643-91c4dd384e6c

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HORRIBLE Lowe’s customer service and experience

Would Not Recommend

I wish i could give negative stars- I ordered this tank quite a few days ago and after initially being informed I would get it in a few days it is yet to be delivered after many days- it came all the way from GA to CA and sat at tge fedex facility & just now out of the blue I get a STUPID AND INSENSITIVE notification from Lowe’s that due to some pricing error the item is not going to be delivered and i see it being shipped all the way back to its origin - what a collosal and HORRIBLE experience-...

RamSharmaMay 21, 2025
From 3.2-Gallon Vertical Well Pressure Tank

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		Name	Current Item iSpring20-Gallon Vertical Well Pressure Tank
		Ratings	41
		Height (Inches)	30.5
		Material	Steel
		Tank Type	Vertical
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878		878	99		99
32.75	37	32.625	17.375	21	12.625	37	48.75	30.31
Carbon steel	Carbon steel	Carbon steel	Carbon steel	Carbon steel	Carbon steel	Carbon steel	Steel
Vertical	Vertical	Vertical	Horizontal	Vertical	Horizontal	Vertical	Vertical