Can anti-syphon valves be hidden?

[JayJay1978]

Yesterday while working on my shower enclosure I noticed the shower trap wasn't the proper trap but one of these with an extension piece and an anti-syphon valve.

This will be a slimline shower tray, I take it these aren't meant to be hidden?

That said it had been there for about 8-10 years without problems.

 

[doitall]

I assume you mean auto air admittance valve.

How do you mean by not hidden.

 

[JayJay1978]

Morning doitall

I'm not talking about the 110mm AAV's rather the ones that are available on waste traps and the one that come in spigot form and can be used in a tee.

Are these valves maintenance free, can they by hidden under floors and forgotton about or do they need to be accesable, I may have to use a normal deep seal shower trap and use a seperate Mcalpine anti syphon valve which will ultimatly be tiled over and forgotten.

Something tells me this is wrong.

The way the room is piped means without them I'll loose my trap seals, I know because I've tried it.

 

[doitall]

Cant you run a pipe up the stud to a higher level.

In the good days we used to rejoin the stack above the flood level, for ventilation.

 

[kevplumb]

heres one dia did earlier

 

[doitall]

Many a true word

I made a fancy terminal like that for the Chrischurch Surgery, still on the roof for all to see see as you drive past.

 

[kevplumb]

and you do know the next 10 posts will be what's that for

last one i was supposed to do the boss said all you do is push some lead wool in the joints and cover it with plumbers mait

no need for hemp and molten lead

ee i did laugh

needless to say i didn't do it

the clown that did made a right balls of it

 

[bathstyle]

......and nowadays they make push fit cast iron that looks identical the the old stuff