1
2
3
1. Pump housing
2. Pump o-ring
3. Pump insert
2. Connect the union end of the pump housing to the 3/4" NPT male inlet of the hot
water source, or male adapter and isolation valve connected to the hot water source.
Make sure that the arrow on the pump housing is properly oriented in the direction of
the supply water flow.
3. Connect flexible supply line to the 3/4” NPT male threads of the pump housing.
Do not twist or excessively bend the hose. Replace the flexible hose with a shorter
length if necessary. Use PTFE tape or pipe compound if necessary.
4. Reattach the motor and timer unit, the insert, and the O-ring to the pump housing.
5. Orient the pump so that the timer is accessible. The timer should never be positioned
in any orientation above the pump housing.
6. Make sure that the screw ring that attaches the motor to the pump is securely hand
tightened. Do not attempt to further rotate the pump timer or the pump may be
damaged.
Over-tightening the pump screw ring can cause damage to the pump. Do not use
pipe compound or plumber's putty on the screw ring.
7. Turn on the water supply to the hot water source and verify that there are no leaks at
any connections.
8. Turn on the faucet/taps or shower farthest from the hot water source until there is a
steady stream of water with no sputter or evidence of air in the lines.
Installation
10
Laing Thermotech ACT-4 wireless Potable Hot Water Recirculation Kit Installation, Operation and Maintenance
Manual
