Multi-Port Positions And Their Function

Filter: This is the valve position for normal filtration and is also the one used for regular vacuuming.

Backwash: Used for cleaning the sand in the filter. When the filter pressure gauge rises 10 to 12 pounds above the start-up (or clean) pressure. Stop the pump and turn the valve selector handle to backwash.' start pump and backwash until water clears. This takes 2 to 3 minutes or less, depending on dirt accumulation.

Rinse: After back-washing, with pump off, turn the valve selector handle to "rinse," start pump and operate for 30 seconds. This assures that all dirty water from backwashing is rinsed out of the filter to waste, preventing possible return to the pool. Stop pump, turn the valve selector handle to "filter," and start pump for normal filtering

Waste: Used to bypass the filter and go directly out the backwash. For draining or lowering the water level and for vacuuming heavy debris directly to the backwash.

Re-circulate: Water is returned to the pool. Bypassing the filter.

Closed: Shuts off all ports.

Back Washing A Sand Filter

There is a pressure gauge located on the multi-port valve or on top of the filter. It will indicate when this procedure is necessary.

Back-washing the filter is necessary only when the pressure reads 10-12 lbs. Over normal startup pressure.

All pools have a different start-up pressure, but the usual startup pressure is about 12 lbs. Without a heater and 18 lbs. With a heater.

You should backwash when pressure reads between 22 to 24 lbs. Without a heater and 28 to 30 lbs. With a heater.
Procedure for back-washing

1. Turn pump off: important never turn multi-port handle until the pump has been turned off.
   
   
2. With palm of your hand on top of multi-port selector handle - push down and turn clockwise to the backwash position.
   
   
3. Turn pump on.
   
   
4. Look at the sight class at the side of the valve (if it has a sight glass) or look at the water coming out the backwash line. The water will become cloudyas you begin to backwash. When it clears again back-washing 1s complete. This procedure should take 2 to 3 minutes.
   
   
5. Turn pump off.
   
   
6. Turn multi-port valve handle clockwise to rinse position.
   
   
7. Turn pump on for 30 seconds to rinse lines and settle the sand.
   
   
8. Turn pump off.
   
   
9. Turn multi-port handle clockwise to the filter position.
   
   
10. Turn pump on.
    
    
11. Check water level after back-washing. If pool water is below proper level add water to pool.