WellMate Fiberglass Water Tanks

WellMate Tanks

WellMate Tanks will perform better and last longer. WM-Series tanks are the ideal choice for new and replacement residential installations and pressure boosting applications. The WM-Series offers features and benefits steel tanks just can’t match. From their corrosion-proof composite construction... to their lighter weight, easier maintenance and less expensive installation… WM-Series pressure tanks are the preferred choice of professionals. Especially when the following advantages are added to the mix: • Replaceable Air Cell — for easier field servicing. • Greater Drawdown than Comparably-Sized Steel Tanks — for greater efficiency. • Extended Labor Warranty Option (by homeowner). • Won’t Rust in Corrosive Environments — particularly important in agricultural and livestock applications, and coastal regions. • Quicker and Less Costly to Install — usually requiring only one person and fewer man-hours. • Wider Pressure Setting Differential — for greater flexibility.

Features and Benefits

Corrosion-proof composite construction

• One piece, seamless inner shell molded of premium high-density polyethylene
• Durable blow-molded interior air cell is fully replaceable and constructed of heavy-gauge engineered polymer
• Bottom inlet/outlet assembly is custom molded of high-impact PVC
• Sturdy molded polymeric base is corrosion and impact proof
• Outer shell is a composite of continuous fiberglass strands sealed with high-grade epoxy resin

Replaceable Air Cell

Greater drawdown than comparably sized steel tanks for greater efficienc

The entire range of WellMate Residential Captive Air tanks are listed under ANSI / NSF Standard 61 for water system components.

Factory five year warranty period for potable water residential installations and 2 years for non-residential installations.

Light Weight – minimizes labor cost; no need for heavy equipment

WellMate WM- Series Performance Data

Model	Gallons	Drawdown* Gallons	Dia. Inches	Height Inches	Connection To Floor	Pipe MNPT	Weight Lbs.
WM-6	19.5	5.9	16	32	1-3/4"	1"	17.75
WM-9	29.5	8.9	16	44	1-3/4"	1"	24.75
WM-14WB	47.1	14.1	21	41-1/4	2-1/4"	1-1/4"	43.00
WM-25WB	86.7	26.0	24	55-1/4	2-1/4"	1-1/4"	72.75
WM-35WB	119.7	35.9	24	74-1/4	2-1/4"	1-1/4"	95.00

Maximum pressure 100 PSI for WM-6 to WM-12, 125 PSI for WM14-WB to WM35-WB
* Drawdown in gallons for 30/50 PSI pressure switch setting

Questions & Answers

What is tank drawdown?

Drawdown refers to the amount of water that evacuates the tank before the pressure switch will activate the pump. Drawdown is a affected by the pump, the size of the tank and the pressure settings that govern your water system.

What is Drawdown or Acceptance Factor?

It is tank drawdown expressed in percentage. Example: The acceptance factor of a bladder tank with a pressure setting of 30/50 PSI is 30% (0.30).

What is the warranty on WellMate tanks?

All WM WellMate tanks carry a five year limited factory warranty for potable water residential installations and 2 years for non-residential installations.

Does the warranty cover labor?

No, unfortunately there are number of factors that can contribute to a failed tank and the only factor that WellMate can insure is the tank.

My tank was just installed and the water has a funny taste – what should I do?

Flush the new tank by allowing water to flow through three or four pump cycles. If the taste continues, you should probably have the source water tested.

Can I use chlorinated water with my WellMate tank?

Of course. WellMate tanks are designed in the knowledge that chlorine is often used to periodically treat a well.

What is a cycle?

A cycle refers to the pump run time. A cycle starts when the pump starts and a cycle is completed when the pump stops. Pump starts and stops are determined by the pressure settings of the system. Below, we demonstrate a tank’s drawdown feature that assumes a water system with a 30/50-psi pressure setting. This means that the pump will start (“cut-in”) whenever the pressure inside a tank is reduced to 30 PSIG and will stop (“cut-out”) when the pressure reaches 50 PSIG . Common pressure settings are 20/40, 30/50 and 40/60.

How does a pressure switch control the pump and tank?

The pressure switch communicates with the tank and the pump. The pressure switch monitors the pressure inside the tank and activates and de-activates the pump when cut-in and cut-out pressures are reached inside the tank.

What is pre-charge pressure?

Pre-charge pressure refers to the amount of air in PSIG that is pumped into a tank prior to installation – usually at the factory. Most tanks are provided with a 28-psi pre-charge. The pre-charge is the “spring” that helps to create water pressure. As the diaphragm fills with water, it compresses the pre-charge. In a 30/50 system, the pump will continue to propel water into the tank until the pressure in the tank reaches 50 PSIG

How much pre-charge should I have in my WellMate tank?

Your tanks should be pressurized to 4 PSIG less than the cut-in pressure setting (for example, if your pressure settings are 30/50, then you cut-in pressure setting is 30 PSIG and your tank should have a 26 PSIG pre-charge).

What is the construction of our pressure vessels?

The vessels have a polyethylene liner with a winding on the outside of continuous strand fiberglass and Epoxy Resin.

How do you check or change the air cell pressure?

To check the pressure in the air cell, the power supply to the well pump must be turned off and the water must be drained from the pressure tank.. With the pump turned off and the water drained from the pressure tank a standard tire gauge can be used on the valve stem at the top of the tank. The pressure in the air cell should be 4 psi lower than the pump cut-in pressure.

What are the operating parameters of the WellMate pressure tanks?

The maximum external temp. is 120 deg. F. the maximum internal temp. is 100 deg. F. the minimum operating temp. is 40 deg. F. The maximum allowable vacuum is 5 inches of mercury. Operating pressure varies with the size and application.

Can the air cell be replaced in the WellMate pressure tank?

The air cell can be replaced, but the pressure tank must be removed from the system and disassembled. Instructions will come with new air cell……but….we find replacing the air cell expensive and labor intensive, therefore we do no sell replacement air cells.