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Hi @denisl,
After you've drilled your hole in the side wall of the pit, the square flange of the Pit Boss should be offered up to it on the outside and stainless steel screws used to secure it in place. Silicone can be used to seal the joint between the Pit Boss flange and the wall of the pit. The square flange sits against the wall of the pit; the circular section does not pass through the hole, whether from the outside or inside.
Once in position, apply solvent cement to the end of your pipe and the Pit boss to secure it in place.
I think what's happened with that comment is they've pushed the circular section through the hole from the outside and then realised you can't push the hose into the back of the Pit Boss. They've then pushed the circular fitting through the hole from the inside, and the pipe will then connect. However, as mentioned, the circular section does not pass through the hole at all. The square flange is stuck and screwed to the outside of the side wall. I've created a rendering for you below, which should illustrate better.
Please let me know if you have any questions.
Mitchell
Hi @MitchellMc ,
Thanks very much, very informative reply as always!
I just want to clarify something you said: "the circular section does not pass through the hole". The circular section you are referring to is the shorter circular side of the pit boss connector, right? I will try illustrate the question with a picture:
The red arrow is the circular section you're talking about?
Is my picture above how it is supposed to sit in the end (with silicone and screws)? Does that mean the hole in the pit wall has to be ever so slightly smaller than the inner diameter of the circular section? To prevent the circular section from sliding in?
Cheers,
Denis
The hole in the pit wall needs to be ever so slightly larger than that smaller circular section @denisl. That little bit goes inside the hole, making it a flush fitment of the flange. The larger circular section doesn't pass through the hole, and what I was talking about.
Sorry, I didn't realise there was a small circular section.
Mitchell
Hey @MitchellMc,
Apologies for re-opening an old thread but I have a similar question so posting here rather than starting a new one.
It seems like it is not possible to install the pit boss lower than this (the photo doesn’t show it quite well but basically I have the bottom end of the flange as close to the bottom edge of the pit as possible):
It doesn’t go low enough. I need my outlet pipe to sit at the bottom of the pit to avoid water sitting in the pit and also to accommodate the inlet pipes which are quite low and I assume they should be higher than the outlet. Am I missing something or is it just flawed design?
Are there alternative ways of connecting a 100mm PVC outlet pipe?
Thanks,
Tom
Hi @tom138,
By nature of the design, there's always going to be a tiny amount of water left in the bottom of the pit. You should be able to get it a bit lower than what you've pictured, though. I suspect the thickness of the insert lip will prevent all water from evacuating to pit. With some very precise drilling, you could probably get the fitting to sit flush with the bottom of the pit.
I've added a rendering below to illustrate.
Mitchell
Hi @MitchellMc,
Thanks for the suggestion. I might just use the top two holes to secure the pit boss or maybe drill new ones a bit higher to have it as low as possible.
The issue is the the flange design itself, which has sort of lip here:
I think there will still be at least 3cm of water sitting at the bottom of the pit. I might just need to fill it with a bit of concrete but I wonder why did they design it like this….
That does appear to be an issue @tom138. I'd take a file and create a little slot in the bottom of the rim to allow better drainage.
Mitchell
I just realized that it is there probably to secure a 90mm pipe but I’m installing 100mm and this reduces the flow significantly.
I might just install the pipe directly and silicone it or perhaps secure the connection by modifying one of these:
