anti siphon valve for exhaust system

[Paulus]

Just removed my anti siphon valve to check it out.  All is good. But, I did notice that the inside diameter is only 1/2 inch, and I thought that I had read that this should be 3/4 inches.
Your thoughts.
Paul

[Ron Hill]

Paulus : I don't believe that any C34 have a 3/4" anti syphon valve.  My 1/2" work fine for over 25 years.

A thought

[Paulus]

Thanks,
Will put the old one back in.  Has been working fine, just doing regular maintenance.
Paul

[Stu Jackson]

If it's the one between the HX output and the nipple, it's 5/8".  For the hose size.

[KWKloeber]

Thanks,
Will put the old one back in.  Has been working fine, just doing regular maintenance.
Paul

Are you saying you removed the valve (duckbill or spring loaded) or the vented loop?  There's no need to remove the loop for normal maintenance, just unscrew the valve and clean it to make sure it operates freely.

kk

[Paulus]

I removed it(duckbill), cleaned and checked the hoses. Put it back in.

Thanks,
Paul