Plumbing · P-YMBB3

Circulation Pump Detail

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This domestic hot water recirculation loop includes a lead-free booster pump, swing check valve, unions, ball valves, and pressure and temperature test ports. The assembly is equipped with an aquastat controller having a bulb in a thermowell, a cross fitting, a digital 7-day programmable timer, and an Acorn Model 8131 hose bibb with vacuum breaker. All fittings, valves, check valves, pipe, and the pump body are insulated with measurement ports extended to the exterior of the insulation. An automatic air vent is installed within 48 inches of the pump inlet to reduce cavitation with a drain line routed to an approved drainage receptor. The 120-volt powered system operates only during occupied hours as programmed on the timer, and the aquastat disengages the pump when return water temperature exceeds 105 degrees Fahrenheit.

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