Myers and Wellmate Brands
PUMPS
HR50S – HR Series ½ horsepower shallow well
jet pump
HJ75S – HJ Series ¾ horsepower shallow well jet pump
HJ100S– HJ Series 1 horsepower shallow well jet pump
The term “shallow well” refers to any ground or below ground shallow reservoir used to collect water from the mains or other source for distribution to the building. This includes the “black tanks” used widely in Guyana for water storage.
The pump should NEVER be used to pull water from the main supply. Not only is this illegal, but if there is no water in the line, the pump can be severely damaged.
HR Series
This pump is designed for use in residential or small business applications.
The motor is a dual voltage (115/230V) brushless General Electric motor, with a convenient voltage change switch.
It carries a pressure switch with a lower setting of 20 psi and an upper setting of 40 psi.
The capacity of the ½ horsepower pump with a 5 foot suction lift is 11.5 gallons per minute, and can easily handle a two storey building for residential or small business applications.
HJ Series
This series is designed for residential, farm, commercial
or industrial applications.
The motor is a dual voltage (115/230V) brushless General Electric motor, with a convenient voltage change switch.
It carries a dual adjustment pressure switch with a standard lower setting of 20 psi and an upper setting of 40 psi. These can however be adjusted.
These pumps have a cast iron pump housing and motor bracket.
The capacity of the ¾ horsepower pump with a 5 foot suction lift is 23.5 gallons per minute, and the 1 horsepower pump is 27.5 gallons per minute.
Other Pumps
QP15 - 1 1/2 HP Self Priming Centrifugal Pump
QP20 - 2 HP Self Priming Centrifugal Pump
CT05B 1/2 HP Centrifugal Pump
CT10B 1 HP Centrifugal Pump
CT10 1 HP LEXAN Centrifugal Pump
CT15 1 1/2 HP LEXAN Centrifugal Pump
CT15B 1 1/2 HP Centrifugal Pump
Tanks
MIL2 – 2 gallon
MIL5 – 5 gallon
MPD14 – 14 gallon
MPD20 – 20 gallon
MPD52 – 52 gallon
MPDH14 – 14 gallon horizontal
MPDH20 – 20 gallon horizontal
Myers tanks are made of lightweight drawn steel and
they use a diaphragm butyl seal, in order to exert pressure
on the water reservoir (drawdown).
The water reservoir has a double plastic lining that
separates the water from the walls of the tank. That
of course prevents the formation of corrosion in the tank and will prevent
the water from showing the color of rust and having
a bad odor.
The exterior of the tank is painted with epoxy paint
and will have a long life unless the tank is scratched
or hit, which will expose this area to corrosion.
It is important when handling the tank to avoid any scratching
or hits to the tank. The base of the tank is made of
plastic (anticorrosive).
In the start-up cycle, the diaphragm is pressed against the bottom of the chamber.
In the fill cycle, water is pumped into the reservoir, which forces the diaphragm upwards into the air chamber.
In the hold cycle, the pump cutoff pressure is reached. The diaphragm reaches its highest position, and the reservoir is filled to its rated capacity.
In the delivery cycle, the pump remains shut off, while the air pressure in the top chamber forces the diaphragm down delivering water to the system.
When the lower pressure setting is reached, the pump comes on automatically and fills back the reservoir back to the rated capacity.
The drawdown is the amount of water that each tank can actually hold in the reservoir. The remaining volume is the air above the diaphragm.
The 2 gallon tank holds .7 of a gallon of water; the 5 gallon holds 1.6 gallons, the 14 gallon holds 5.2 gallons, the 20 gallon holds 7.4 gallons and the 52 gallon holds 19.2 gallons.
Wellmate Tanks
The Wellmate company was purchased by Myers.
WM-6 – 19.8 gallon capacity; 5.9 gallon drawdown
WM-9 – 29.5 gallon capacity; 8.9 gallon drawdown
WM-12 – 40.3 gallon capacity; 12.1 gallon drawdown
WM-20 – 60 gallon capacity; 18 gallon drawdown
Construction is of fiberglass with epoxy, so they don't rust.
These tanks have an air cell inside instead of a diaphragm.
The WellMate tank air cell can be replaced.
The WellMate tank has half the weight of a traditional diaphragm steel tank, so it is more practical to be transported and requires less people to handle the same size of tank.
The Wellmate tank comes with Schedule 80 PVC connections, which are very strong and highly resistant to impact.
Advantages & Disadvantages
Using a Myers pressure system eliminates the need for the construction of an overhead trestle, and the purchase of extra tanks.
The system will guarantee a full flow of water required to work showers, toilets, Jacuzzis, filters, heaters and washing machines among others.
Myers pumps use very little electricity and will not adversely affect your light bill.
In the event of a blackout, the pump will not be able to come on to refill the reservoir, and therefore water will not be able to flow through the system. The answer to this is to use a bigger tank, which will give more drawdown before the pump is needed. The larger tank also means that the pump will turn on and off fewer times, and run longer, which adds to the life of the pump.
Troubleshooting
One of the most important things is to read the installation manual. A common problem is not installing a non-return valve, which is essential for the pump to operate properly.
Another important factor is that all connections in the system must be completely sealed so as to avoid pressure loss.
A damaged pressure tank diaphragm also causes problems in the system.
