How To Replace a Hayward DE Filter Pressure Gauge

Things You’ll Need

• Back Mount Pressure Gauge 0-60 1/4" NPT REAR/BACK
• Pressure Gauge w/ Dial Hayward Oem Back Mount

Step 1

ORDER PARTS - Order a Pressure Gauge to have it on hand to replace the broken Pressure Gauge. If you want to match the pressure gauge to the one above with a dial, see "Pressure Gauge w/ Dial Hayward Oem Back Mount". The dial allows you to set the upper psi limit at which you should backwash your filter.

Step 2

TURN OFF PUMP - Before you remove the broken Pressure Gauge make sure you TURN OFF the pool pump.  For maximum safety turn off the power at the circuit breaker to the pump.

Step 3

RELIEVE PRESSURE - Next you will have to relieve the pressure that builds up in the filter during operation. To relieve pressure turn the relief valve lever on top of the filter counter-clockwise. Water may spray out initially as you see the pressure on the pressure gauge go to 0 psi.

Step 4

REMOVE PRESSURE GAUGE - The Pressure Gauge is located on the end of the Air Relief Valve on the Hayward DE Filter. Twist the Gauge off in a counter-clockwise direction. If it does not turn easily, use an open end wrench on the brass nut at the base of the Gauge.

Step 5

TAPE THREADS - Put 2-3 layers of plumber's Teflon tape on the threads of the new Pressure Gauge. Wrap the tape in a clockwise direction so it will stay on as you screw the Gauge on.

Step 6

SCREW ON PRESSURE GAUGE - Thread the Pressure Gauge into the Air Relief Valve in a clockwise direction. Use an open end wrench to tighten the last 1/2 turn. Do not over tighten.

Step 7

TURN ON PUMP - Turn ON the power to the pump at the breaker box.

Step 8

CLOSE RELIEF VALVE - When a steady stream of water shoots out of the Air Relief Valve, close the Valve.

Step 9

CHECK READING - Check the pressure reading on the Pressure Gauge. It should read about 10-15 psi.  When the pressure moves up to 10 psi or so higher, it is time to backwash your filter.