PRESSURE SUPPORT: Deep-drawn steel domes for extra strength (twice the strength of rolled steel).
 
   
Exclusive welding process eliminates interior rough spots and sharp edges and prevents damage to diaphragm and liner.
   
   

Every finished tank is pressure tested for leaks and design safety.

Exterior appliance-like enamel finish beautifies and protects each tank from the element.

100% non-metallic water reservoir.
   
   
Heavy-duty butyl diaphragm flexes, never stretches or creases, with seamless construction for uniform strength. It conforms exactly to shell configuration, with no bubbles or corners to trap water or sediment.

Heavy-duty butyl diaphragm
meets FDA requirements for potable water supply, does not support bacterial growth, and is the best known elastomer to prevent air loss.
   
   

Polypropylene liner and acceptance fitting provide a rigid water reservoir that is 100% corrosion resistant.

Certified and listed by:
NSF International Standard 61.

Unique diaphragm seal ring.

Copper-lined acceptance fitting is silver brazed for watertight seal.

   
   
Factory precharge - each WELL-X-TROL is pressurized to define the pump cut-in pressure.

Air valve is brazed (not mechanically threaded) with a tamper-proof warning label.