Drains

[ScottishGasMan]

Hey all.

Doing my bathroom up just now, pulled practically everything out it, and have been fitting the new shower tray.

Ive fitted all new 40mm drain pipes from it to the cast iron pipe under the floor as the old glued conections cracked.

On finishing the drain for the shower, i pourd a basin of water in and it just sits there lol. it does drain you can hear it in the pipes, but very very slowly.

how the hell can that be? I know its not easy not seeing it, but the showers in the corner of the room, 40mm plastic drain running down hill at all times with a U trap in it connecting to an iron pipe about 4 foot away.

any hint or advice for what ive probably done wrong?

cheers

 

[Bahco]

Obviously a blockage somewhere. Check all new pipes are clear and if so look at soil pipe and drains.

 

[ScottishGasMan]

i dont understand how it can be blocked, its new! the old cast iron drain was working spot on before hand, thought it might be some airlock/movement issure, ill try get some photos if it so I can show yous how its set up.

 

[Bahco]

It could be a venting issue.

Is the soil pipe vented to atmosphere?

 

[ScottishGasMan]

ive not connected the sink yet so its got an open end on part of the waste pipe, could that cause it?

 

[Bahco]

a U trap in it connecting to an iron pipe

Why have you used a u trap when a shower trap will suffice.

 

[ScottishGasMan]

its how it was set up with the old shower Ive never been trained on drains only freshwater plumbing so Im sure im missing somehting stupid lol

 

[seco services]

try blocking the basin waste for now and try it again.

 

[ScottishGasMan]

it was the U trap. just kept pouring water down while disconecting things and found its just not letting water flow round it, its not blocked or anyhting its just not running like that.

So im taking it out and it should be fine, didnt realise the shower tray connector has a trap built in

cheers folks