Does anyone know what one of these it ?

[phcjpp]

Hi,

We live in a London victorian semi and are in the process of getting our front drive done. We discovered what looks like a clay glazed pipe in the flower bed and were wondering what its for. It seems to lead into a sewer access point (covererd by a manhole cover).



We were also surprised it was open like this and did not have a cover of some form.


Many thanks for any help

Chris

 

[Best]

Hello Chris. It could be an access point, as you say, but possibly to a trap in the sewer. Usually found just where sewer leaves your property. This was done to allow for a sewer pipe run to be higher than the road connection & then dropping from the trap. It also meant that sewer gases coming from the main sewer cannot get past & into your property because of the trap.
You must keep this access point as sewer can block at the trap but is very easy to clear if you can lift a cover.

 

[plumben]

as above, I belive it's called an interceptor or something along them lines,
they usually do have a cove but its probley been lost or broke,
you need to keep it but get a cover for it

 

[stevetheplumber]

thats not an interceptor all though there may be an interceptor in the chamber below that was originally an air vent for the drains and would have had a metal fitting in it with a mica flap which allowed air to flow in the drains i will see if i can find an image
like thishttp://www.cadia.com.au/mica-vent-flap-valve

 

[Best]

Buchan Trap, is the name of what I was talking about. I knew its name, but wasn't sure how to spell it properly, so I looked it up on Internet.
It might not be that, but there are a lot of them on older houses where I am.

 

[kris]

It might be the top of a Buchan trap you'd know if you dig up a little next to it you'd find the swaned neck base or it could be an old clay rodding point although I can't see why thered be a socket ...I'd go for Buchan .

 

[wildcard]

Yeah it"s an unexploded WW2 bomb,seen a few around that area.

 

[stevetheplumber]

lift the cover and pour a bucket of water down it if it comes out the wall of the chamber its a vent if it runs directly into the channel its an old drain connection if you dont see the water at all it a rodding eye

 

[tom609]

Could be s disused drain from an outside loo

 

[Nuttyboy]

Probely a vent pipe would of had a 45 with grill on it