Leak from backwash with new gasket?


New member
Sep 10, 2013
Hello everyone, first post to TFP.

Moved in to a new house 2 weeks ago, and we noticed a leak coming from the backwash hose on our Purex Triton tagelus ta100d sand filter. We opened up the filter, and noticed the spider gasket was ruined. We ordered a new one and installed it, and the channels where it sits were in good shape.
However, there is still a small leak from the backwash.

Things I noticed (not sure if they're relevant)
After I turn the pump off, there seems to be suction from the backwash port for a minute. All the water also drains out from my pump if I change the multiport position.
Also, my heater won't turn on (shows a lo error), which I think is from the reduced water pressure(filter psi gauge doesn't show anything)


TFP Expert
LifeTime Supporter
Jul 30, 2010
Twin Cities, MN
Welcome to tfp, Mtym :wave:

If the new spider gasket is still in place (I would check it again), and the handle is seating correctly, I would guess the vavle spring is weak and might need to be replaced.


Mod Squad
TFP Expert
Platinum Supporter
LifeTime Supporter
In The Industry
Apr 1, 2007
Sebring, Florida
Okay, I will look at it. Is this probably the reason why my heater won't turn on?

Also probably unrelated to the heater, but if your psi is zero with the pump running (and you have flow) you need a new pressure guage.

Can't help with the heater.