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Amtrol Well-X-Trol 119 Gallon Water System Pressure Tank - WX-350

Model # WX-350
The Well-X-Trol WX-350 pressure tank, floor stand model is specifically designed for larger homes and institutions such as country clubs, farms, nursing homes, etc. This handles the demands of larger systems in a minimum of space.

Amtrol Inc. invented the first pre-pressurized well tank over 50 years ago. This revolutionary product featured an innovative design using a hoop ring and groove to lock the diaphragm, liner and shell together in a totally unique way.

This tradition of innovation continued with Amtrol’s Next Generation Well-X-Trol, which utilized high strength steel to deliver 150 psig working pressure - 20% higher than competitve well tanks. Backed by an industry leading 7 year warranty.

Now Well-X-Trol is combining its patent-pending Turbulator™ with an antimicrobial liner to deliver Clean Water Technology™ in every tank.

Well-X-Trol - the world’s most trusted brand of well tanks; setting the standard for quality, reliability and performance.

Availability: In stock

MSRP $1,727.00

OUR PRICE $999.00
*Free Shipping

Features and Accessories

Product Features

The Industry’s Longest Warranty: 7 Years

NEW Antimicrobial Liner Protection
  • Kills over 99.9% of bacteria on contact.
  • Safe, Silver-Ion technology only targets active microorganisms.
  • Long lasting compound protects water reservoir from biofilm fouling.
Fresh Water Turbulator™
  • Patent-pending diffuser agitates incoming water stream.
  • Water-jet scrubbing action prevents sediment buildup.
  • Eliminates stagnant water in VFD applications.
  • Helps extend the life of the tank.
Projection Welded Air Valve
  • Eliminates threaded valve leak paths.
  • Tamper-evident warning label for added safety.
NEW High Strength Steel (HSS) Construction
  • Deep-drawn dome for double the strength of rolled steel.
  • Multi-dome construction for internal bracing.
Multi-Dome Construction
  • Provides internal bracing for added strength.
  • Prevents diaphragm over-extension.
Positive Hoop Ring and Groove Seal
  • Unique hoop and gring groove design secures the diaphragm, liner and shell for added strength and reliability.
  • Exclusive welding process eliminates interior rough spots and sharp edges that can damage the diaphragm and liner.
Seamless Heavy Duty Butyl Diaphragm
  • The Industry’s thickest diaphragm for extra strength and flexibility.
  • Conforms exactly to the shell without stretching, creasing or forming bubbles that could trap water or sediment.
  • Meets stringent FDA requirements.
Polypropylene Tank Liner
  • Provides 100% corrosion resistant, non-metallic water reservoir.
  • NSF® International Standard 61 listed for clean, safe water storage with no taste or odor.
  • BPA Free
Stainless Steel System Connection
  • High grade stainless steel withstands agressive water conditions.
Best-in-Class 150 psig Pressure Rating
  • 20% higher working pressure performance.
  • Each tank is pressure tested for added safety.
  • Pre-pressurized to 38 PSI (the most common pump cut-in pressure).
Tuf-Kote™ HG Indoor/Outdoor Coating Technology
  • Now standard on all models
  • Stands up to the most severe environments.
DuraBase™ Composite Tank Stand available on some models
  • Patent pending design is engineered for strength and improved air flow under the tank.
  • Allows tanks to be installed directly on cement floor without worry of scratching paint and exposing steel.
  • UV resistant material is rugged and will never corrode.


Additional Info

Model # WX-350
Material Steel
Capacity 119 gallons
Connector 1 1/4" NPTF
drawdown_40_60 31.9 gallons
drawdown_30_50 36.8 gallons
Shipping Weight 206
Product Videos Amtrol Well Tank Basics,Well-X-Trol Next Generation Tanks
Warranty 7 Year Limited


Pressure Tanks

How much air pressure should my pressure tank have?

This depends on which pressure switch you have.  If you have a 40/60 switch, the air pressure in the tank should be set to 38 PSI.  The general rule is to set the pressure at 2 PSI below the cut-in pressure (the pressure at which the pump turns on).
To set this accurately, your well pump must be turned off and all water needs to be drained from the tank.  

What is Drawdown?

Drawdown refers to the amount of water available in a pressure tank for use before the pressure switch turns the pump back on to replenish the supply.  The larger the drawdown, the longer your pump will run for each cycle increasing pump life by reducing the number of times the pump has to turn on. 

Product Literature


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