The Brew Cabin

Posted: **Sun Dec 18, 2005 6:59 pm**

Hi,
New to the forum and would appreciate some help! I have an existing manhole, about 850mm deep built from brick/concrete with a saltglaze rightangled bend. I need to join this bend to follow the flow and this will in effect make it into a 't' joint.
What I am unhappy about is joining at the same level as this will not only mean cutting through the benching but the saltglaze pipe. I am really worried that it would be easy to break the existing pipe and turn into a disaster but I haven't run it past the Building Inspector yet!
Can I terminate the new 100mm plastic pipe just above the saltglaze and bench around it? The new pipe will discharge waste water from sink/washing m/c. Or an other suggestions?!
Cheers,

Dunc

Posted: **Tue Dec 20, 2005 11:56 pm**

If the BCO is a stickler, they won't allow you to bring in a foul branch above invert level, which, in plain English, means your inlet has to be at the same level as the bottom of the channel inside the existing MH/IC.

However, there are rumoured to be some BCOs who aren't overly obsessed with this requirement when the FW inlet is kitchen waste, which is assumed to be predominantly liquid and not solids (as is the case with bathroom waste)

However, to construct a fully-compliant IC, I'd be tempted to smash out all of the old chamber and replace it with a new placky IC, summat like as shown on this page which documents an IC installation by Ken Culshaw (KGC Paving) of this parish. This, as I said, ensures you're not going to risk the wrath of the BCO, and also ensures your new branch has its own custom-made inlet. Further, it would eable you to have 'extra capacity' if you need to extend the drainage at some time in the future.

I know it's a ball-acher to break out the old chamber and get rid of the rubble, but when you consider how much effing about is needed to insert a new branch into an existing bwk chamber, and the degree of delicacy required to ensure you don't damage or break the existing salt-glaze, it has to be worth considering!

Posted: **Wed Dec 21, 2005 6:37 pm**

Tony,
Thanks for the advice, I have spoken to my Building Inspector and he said come in over the top and bench over that. All very practical!

Cheers,

Dunc

The Brew Cabin

Joining into existing manhole - Plastic into saltglaze....