[clive ware]

My Blazer primes perfectly but will not pull any chemicals once I turn the chemical flow valve to the `on` position and pull the wand trigger. saving me a fortune in chemicals but would be nice to have it working. Any ideas anyone.
Cheers

[Paul Moss]

Don't use it then.

[clive ware]

Sounds like one of my answers!!

[Bob Allen]

Hang on a minute.......................Nope its gone again 

[elliott cleaning]

Either your chemical selector valve is defective and only allowing prime or off

Or the metering valve is knackered

Have you tried turning the metering valve off zero, Clive? - it helps

[clive ware]

Right - I`m not taking any more of this!!
I`m off to world of clean!!!

[Bob Allen]

I wish I had never taken the pee now!!

My boxxer 421 is priming ok but the float valve is not returning to zero, it seems to be using too much chemical now any ideas ?

[Simon Gerrard]

No.

[Simon Gerrard]

Chemical check valve will be stuck open.
No 22 on the picture, similar to the check valves in your pump
Simon

[Len Gribble]

I would go for 25

[Simon Gerrard]

If it was 25 it wouldn't prime, if a check valve is stuck open it will flow too much chemical.

Simon

[Bob Allen]

Just to add it stays at about 4gpm and if i turn it down it seems to go up?

[clive ware]

Ha Ha  - just seen that diagram. Thats what the inside of Bob`s head looks like!!

[Chris D Thomas]

Bob sounds like either your diaphragm is split forcing chemical directly into the pump head or the 3/8th check valve behind the solution outlet has failed allowing chemical to back feed into the system.
Clive it could be the diaphragm gone all gooey (technical term) something under the check valves or air being drawn into the chemical system through a loose or split fitting.
Hope this helps