New drainage/plumbing

[yardie]

Want to get the heads up on the expected works for this proposed ext.

Highly doubt utilising the existing soil pipe to be an option as lowest connection needs to be a min of 450mm from bottom.

Being a gnd fl ext would a new stack be needed?

1 cloakroom sink, 1 w.c, 1 x kitchen sink, probably condensate boiler requires waste connection too!

 

[denso13]

Being a gnd fl ext would a new stack be needed?

Not necessarily, hard to say exactly.

 

[Hugh Jaleak]

Drains are not ridiculous far from the footprint of the building, new runs can be laid as required, possibly may need another chamber fitting at connection point for WC, but not a difficult job. Stub stack in WC could take WC, basin and boiler condensate. Kitchen sink, fit a bottle gulley, can be connected to the main run on a blind lateral then.

Provided there is an existing vent on the CI stack serving the 1st floor, no additional ventilation should be required, although good practice to fit an AAV on the stub stack if you choose that method.

Not sure about Ground floor WC, shows one WC inside and one outside the external wall position?

 

[yardie]

[QUOTE="Not sure about Ground floor WC, shows one WC inside and one outside the external wall position?[/QUOTE]


The existing wc is shown outside the wall position, used to be an outhouse/shed and w.c inside the wall is the new proposed w c.

 

[yardie]

Kitchen sink, fit a bottle gulley, can be connected to the main run on a blind lateral then.

I get the bottle gulley, would be outside the kitchen window on the other side of the kitchen sink.

'Connect to the main run on a blind lateral' - would this be connecting to the run shown at the back (5m out) or brought to the front run also connected to the w.c etc?

I would assume you mean to the rear run and blind lateral would be a downward drop into it?

 

[yardie]

It is required to be done per BR's and LA sign off!!

 

[Hugh Jaleak]

The existing wc is shown outside the wall position, used to be an outhouse/shed and w.c inside the wall is the new proposed w c.

In that case the drain for the existing WC will be just outside where your new WC is proposed, providing BCO is happy with it, no reason why you couldn't couple onto the drain going away from that, provided its accessible for rodding if the need arose. Any idea where it may run? (If you dont use it then it needs capping off or you run the risk of rodent issues, they like a nice dry section to nest in, and if there's a way out, even better...)

Bottle Gullies enable the outgoing drain to be accessed from the gulley, so should be ok with connecting that up to the run going across the top of your diagram, unlikely you'd need a chamber where it connects as it can be rodded from the gulley. (Drain runs need to be as short as possible.) Run sink waste through the wall into the gulley.

 

[yardie]

In that case the drain for the existing WC will be just outside where your new WC is proposed, providing BCO is happy with it, no reason why you couldn't couple onto the drain going away from that, provided its accessible for rodding if the need arose. Any idea where it may run? (If you dont use it then it needs capping off or you run the risk of rodent issues, they like a nice dry section to nest in, and if there's a way out, even better...)

Bottle Gullies enable the outgoing drain to be accessed from the gulley, so should be ok with connecting that up to the run going across the top of your diagram, unlikely you'd need a chamber where it connects as it can be rodded from the gulley. (Drain runs need to be as short as possible.) Run sink waste through the wall into the gulley.

Thanks for the advice, much appreciated.
I'm fully aware that the BCO has the final say and may advise differently so best to have options and try to understand what it is I intend on doing to please him.

Ah yes, use shortest runs possible so run kitchen sink to outside gulley (shall use a removable gulley for ease of future rodding/cleaning) and out to the rear. Its very likely facility for a dishwasher will also be put in place so shall consider that too in the internal plumbing design.

The existing w.c runs out to the front directly to the manhole so accessible from manhole up to existing but it runs diagonal. So extending it across to the proposed w.c would create an acute angle. not something that would be acceptable I don't think? guess it depends on the type of fitting used, I'm not familiar with plumbing fittings.

 

[yardie]

To be honest the invert at the exist'g w.c to G.L is probably too shallow to put a fitting on to then have a rise up to the proposed w.c location. This drain pipe (between old and new w.c locations) will bridge across a pathway! I'm not sure what depth drain pipes need to be buried but doesn't seem to be adequate enough in this instance.
So its looks like the old pipe will need to be 'removed' (also resolves the rat /redundant drain problem) and replaced with a new pipe at the same manhole location as the old one brought up to the new w.c location Now, will it come 'directly' up to the w.c location or next to the w.c (on the outside corner, inside the room of course)? This is in the form of a chamber, what your referring to as a stub stack? This is what the w.c will then connect to via a pan connector above F.L to a downward 90deg bend and a short length of pipe to the 'chamber' which is under F.L.

 

[Hugh Jaleak]

Depending on depth, a shallow inspection chamber can be used, 225/300mm diameter, you'd need to come in under the floor level then a bend for the stub stack, if invert levels will allow. If a suitable fall cant be achieved, look at the nest shortest run to the existing drain, but factor in putting a chamber on the run where the new WC will join.