Can I connect 2 tanks together for more water storage?

I put two 3.2 gal tanks together with a tee last month. It works fantastic!!

Anyone know if this will work for Whirlpool RO systems? The support rep told me any RO tank would work. Anyone use this for another system?

I don't think it matters what RO system you have. If it has the option for a reserve tank and the fitting works, then it should fill with water.

What is the pressure rating for the tank. Can it handle 60 psi?

Remember that the RO system water valve regulates the "internal" pressure, so the tank is not going to see the actual water line pressure. Most valves operate at 65%, so if your water line pressure is 60 psi, the pressure at the tank generally won't be more than 40 PSI. In most setups you'd need the pressure on the water line to be around 92 PSI to get 60 PSI on the tank.

What is the diameter of the 5.5 gal tank?

Thanks for the question! The diameter of the tank is 12" x 16" (H) Kindest, iSpring Team

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T32M Pressurized Water Storage Tank with Ball Valve for Reverse Osmosis RO Systems, 4 Gallon, 1/4" Tank Valve Included, White

Product ID: 1349013

Details

Brand
iSpring
Capacity
3.2 gallons
Included Components
tank
Installation Type
Under Sink
Material
Stainless
Package Information
Bottle

💧3.2 gal capacity

🔧1/4" stainless steel valve

🛡️NSF/ANSI certified safety

₨6967

Duties & taxes included

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Description

💧 Stay hydrated, stay ahead — the tank that keeps your water pure and your lifestyle seamless.

VERSATILE INSTALLATION - Works flawlessly in both vertical and horizontal positions to fit your space.
FOOD GRADE BUTYL DIAPHRAGM - Ensures tasteless, odorless water with post-cure treatment for pure hydration.
PREMIUM 3 2 GALLON CAPACITY - Generous water storage to keep your RO system flowing without interruption.
DURABLE STAINLESS STEEL VALVE - 1/4" NPT valve thread with included ball valve for reliable, leak-free control.
PRE PRESSURIZED FOR INSTANT USE - Factory-set 7-10 psi pressure means water is ready when you are—no waiting.

The iSpring T32M is a 3.2-gallon pressurized water storage tank designed for reverse osmosis systems. Featuring a food-grade butyl diaphragm certified to NSF/ANSI standards, it guarantees tasteless and odorless water. Equipped with a durable stainless steel 1/4" valve and pre-pressurized between 7-10 psi, it ensures efficient water delivery in any installation orientation. Ideal for under-sink setups, this tank combines reliability, safety, and convenience for modern water filtration needs.

Specifications

ASIN	B00439MYYE
Best Sellers Rank	#4,700 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #10 in Under-Sink & Countertop Filtration
Brand Name	iSpring
Capacity	3.2 gallons
Container Type	Bottle
Customer Reviews	4.6 4.6 out of 5 stars (7,161)
Global Trade Identification Number	00662425023684
Included Components	tank
Installation Type	Under Sink
Item Dimensions L x W x H	11"L x 11"W x 14"H
Item Type Name	with Ball Valve for Reverse Osmosis RO Systems
Item Weight	8 pounds
LowerTemperature Range	40 °F
Manufacturer	iSpring Water Systems
Material Type	Stainless Steel
Model Name	T32M
Model Number	FT32M
Number of Items	1
Number of Packs	1
Operating Pressure Range	7-10 psi
Other Special Features of the Product	NSF certified
Part Number	T32M
Power Source	Water Pressure
Purification Method	Storage RO Water
Supported Water TDS Level Maximum (PPM)	300
UPC	662425023684
Upper Temperature Rating	100.12 °F

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