Waste drain testing

[cox377]

Hello there,

Thanks for coming back to me.

The man whole does come up in the main part of the extension.

To be honest, at the moment, the problem I'm having is the damn bungs blowing out before it even registers anything on the gauge.

J

 

[polesapart]

Yes, the screw-up drain plugs can be a little awkward to work with. Wetting them may help a good seal. There are also inflatable bags you can use (I think Monument make one kind)
The pressure involved on an air test is only 50mm water guage or so- enough to make the water in a w.c. pan stand up but not enough to blow the trap seal. All waste appliances are connected and traps full.
You could use childrens' party balloons inflated in the relevant pipe sections to seal of against that sort of pressure - I once used an inflated condom to seal a 75mm SVP in a successful stack test. You push the test (manometer) hose through the w.c. trap in this case as well as a plain hose through which you blow gently. This is much more pleasant if no-one has used the w.c. since installation.
Test between the pipe section just before it enters the manhole (1 bag or bung pushed up it ) and the top of the vent pipe (2nd bag/bung) if there is one, removing AAV (Durgo) if applicable.

 

[cox377]

Okay, that sort of pressure seems reasonable.

Before the gauge reads anything one of the bungs pops off but I'm running the air for a fair bit before that happens.

At the moment, there is nothing installed, re toilet etc. I wanted to get a confirmed test for my own piece of mind before I moved forward.

Thanks

J

 

[noseall]

I think the whole thing's a bit silly really.

If the internal chamber starts to whiff, you will know it is leaking air. If so, seal it with grease.

No whiff = sound lid.

 

[cox377]

BCO coming for a visit later in the week.

Wish me luck

J

 

[polesapart]

I do trust this is not a wind-up.

A good bit of kit for testing hot, cold or central heating pipework where pressures of 1-4 bar are to be expected.

4 bar =120 ft water gauge in old money. A soil stack air test requires 2".

A manometer (U guage) is what you need.

 

[cox377]

I've actually come to realise that today haha

Live and learn

 

[Nige F]

Air test above ground used to be standard but BCO's aren't what they were.
.

Aparently some are ........................Women

 

[cox377]

BCO came to see me yesterday morning, the BCO wants to see an air test.. now got to source the proper gauge as I want a positive test for my own peice of mind before I move forward

 

[cox377]

Guys, can anyone make a recommendation on where to buy one of these guages and what a non-crap one looks like lol.

Please excuse ignorance

J