For my cloakroom refurbishment project, I am installing a counter-top basin and using a 32mm HepVO trap mounted horizontally underneath in order that the waste is easy to conceal under the counter using only a fairly narrow piece of hardwood at the front.
In order to do this, Hepworth supply an 87 degree knuckle adaptor to fit the basin waste and then into one end of the trap,
The nut of the knuckle adaptor which mates with it is quite deep and the effect is that when fully done up the nut bottoms onto the lower part of the waste fitting leaving the knuckle slightly loose and without the O-ring forming a seal.
So the question is whether there exists a fitting that will address the issue or perhaps some other solution. Changing the waste is not an option because it matches the tap.
Ideas so far:
- Carefully cut about 3-4mm from the depth of the nut on the knuckle fitting. The nut is deep enough that this probably would work. Even if I c*ck up the fitting, a replacement is cheap enough.
- Some kind of adaptor that would screw onto the waste but have threaded male and female sections. At the top it could be sealed with PTFE tape. In effect, this would act as an extension to the depth of the waste. I could tolerate a 20-30mm drop of the trap compared with its existing position. However, I don't know the thread type of the basin waste - presmably some imperial thing? Perhaps there is a brass fitting that would do the job. For that matter it could be a knuckle adaptor and replace the HepVO one - needs to have a male thread of the same size in either case.
Undoubtedly someone else has had a similar issue with a waste fitting. Any ideas?
thx
.andy