Flowlight Booster Pump Instruction Manual

INTAKE PIPE MUST BE SIZED GENEROUSLY to allow no more than a slight pressure drop at

peak flow rate, or pump will be noisey and will wear rapidly. USE PIPE REDUCER FITTINGS to

adapt your pump's inlet or outlet to larger pipe size where necessary. Excessive pipe sizing will

do no harm!

INTAKE MUST NOT BE RESTRICTED by undersized pipe, excessive suction lift, or a

CLOGGED FILTER. Excessive suction at the pump intake causes CAVITATION (formation and

implosion of vapor bubbles). This causes very loud buzzing noise and RAPID PUMP WEAR. A

slight buzzing noise is acceptable, if it cannot be avoided.

DO NOT USE THIN-WALL HOSE or soft tubing on the pump's intake. It may collapse under

suction and restrict the flow. Do not use polyethylene pipe (black flexible) for the suction either.

It is prone to slight leakage at the fittings.

INLINE FILTER should be mounted HORIZONTALLY and as low as possible. This prevents

any air trapped in it from blocking the water flow. Be sure to leave some space below it for a

pan, to catch water when replacing the filter cartridge.

FOOT VALVE is a check valve installed at the water intake. It is required in any case where the

pump is located higher than the low-water level in the source. We recommend a high quality

spring-loaded type to avoid loss of prime. A check valve allows water to flow one way and not

the other. Be sure to install it the right way! Our 30” Intake Filter or Fine Intake Strainer Foot

Valve accessory is recommended. These prevent debris from catching in the foot valve and

causing loss of prime.

REMOVE FOAM PLUGS BEFORE CONNECTING PIPES. New pumps are packed with foam

plugs to prevent contamination.

PRIMING YOUR PUMP: Priming a pump means filling its intake and suction line completely

with water. This must be done if the pump is mounted higher than the water source. A

removable plug or a valve must be installed at the highest point is in the suction plumbing.

Prime the pump and intake line by pouring water into the opening until it is completely full. Your

foot valve prevents loss of prime by not allowing water to flow back into the water source.

Your pump will create enough vacuum to SELF-PRIME to around 10 feet (less at high

elevations), but only when it is in new condition and wet inside. A priming plug is always

recommended if the pump is to be located higher than the water source. (EXCEPTION -- see

"Installation in Deep Well Casings"). You may use a good quality ball valve instead of a plug, if

frequent priming is expected.

A CHECK VALVE AT THE PUMP OUTLET is required if there is more than a 30 foot lift above

the pump, or in any pressurizing system. This allows the pump to start easier. It also prevents

back-flow when changing filter cartridges.

PIPE UNIONS: If you run rigid piping (copper or PVC) directly to the pump, unions are required.

Unions make pump replacement easy, without the need to cut and re-solder or re-glue the pipe.

"Copper Flex Connectors" commonly used for water heaters may be used instead. However:

Do NOT use them for the larger Slowpumps (2507, 2607) or Booster Pump. They are too

restrictive.