DIY Doctor

Hepo valve with Possible vacuum lock - help needed

Postby ravitek » Sat Oct 10, 2015 7:19 pm

I have a Hepo valve, AKA fanny trap valve (40mm, 1.5"). Under a basic on a kitchen island. It was functioning fine for 3 years unto recently the sink appeared to be blocked. Have cleaned out the tubes (think I have done this sufficiently) using a brushed rod, I even disassembled the overflow on the blanco sink and clean that out too. Clean the outside drain that meets the main kitchen sink, and got my hands in there to clean it out of stone and other debris. I found during this cleaning that pulling a black inner from main drain released some vacuum lock and clear the drain. A few days later, the sink blocked again. I proceed to remove the hepo valve and test the remainder of the drain by pouring water in the last run of the pipe. From this process of elimination it appeared that the hepo valve would be at fault (simple design that it is).

Today I replaced the valve with a brand new (not cheap) appears to be exact match as I took the old one in to the plumb shop in Baldock - Didn't work - "Same fault".

Now I'm lost for ideas.

I suspect that there is a vacuum lock of some sort occurring, as I remember in the past I had slightly loosened the valve and this did clear the water, but resulted in drips.

I'm assuming the ribs on the valve doesn't matter in this vertical installation.

I'm not sure if the outside drain needs the black inner checking or I am missing something on the installation.

Any ideas would be greatly appreciated.
Rank: Labourer
Progress to next rank:
Posts: 1
Joined: Sat Oct 10, 2015 6:59 pm


Simply Build It

  • DIY How to Project Guides
  • DIY how to tutorial projects and guides - Did you know we have a DIY Projects section? Well, if no, then we certainly do! Within this area of our site have literally hundreds of how-to guides and tutorials that cover a huge range of home improvement tasks. Each page also comes with pictures and a video to make completing those jobs even easier!

  • Related Topics