Originally Posted by Max...
Peter - try a search for 'elephants trunk' on here - loads of previous how to fit topics etc.
FWIW I had done the search in the past and did it again last night. Also using "elephant drain", and included a google search. I have quite a few photos saved of boats with elephant drains.
Since the OP and I are trying to accomplish the same thing...here are some specific questions I/we would appreciate any possible help on.
Seems there are no direct answers to my questions available, at least that I can find. I have not been able to find a materials list for DIY which would be my preference.
1: Material for the tube? One person says use Hypalon only, and someone else says "bah", just use PVC.
2: Thickness of material? I already have the two part glue for PVC since my Zodiac is PVC, and it needs to be used up. I even have some PVC, but think it would be too thick. Maybe not, but I am not sure what others use for thickness?? I can buy material, but quickly catch up to buying a kit, if I could locate one in the US.
3: How many drains on a 4.2m hard bottomed SIB? For my boat, the fuel tank is on the port side within a couple of inches of the transom, and therefore would not let as much water out, although still more than not having a tube there. A drain on the starboard side is not as easy to reach since I sit on the starboard tube when driving.
4: Where do you mount the tube? Someone suggested mounting the tube half way between the top and bottom deck? This would drain both but would slow down draining the top deck (Assuming I am only using one). In washing my boat I have found it drains under the deck pretty slowly and I already have a couple small factory scuppers in the bottom of the boat (Usually they are plugged unless we are hauling a bunch of water into the boat with our dive gear).
Photos I grabbed off this site, that shows an above and below deck mount. I think it was an RNLI boat which is designed to be swamped. Hope it is okay to post them by whomever the owner of the photos is.
5: Material for the tube thru the transom? What have other DIY folks used? Something from the local hardware stores plumbing department? Someone found a bronze or stainless item that works? Maybe simple plastic piece? Did you just use a stainless hose clamp to hold the elephant trunk to the drain tube?
6: Size of hole? I have read anywhere from 68mm-70mm for the id of the hole in the transom.
7: For me specifically, does anyone in the USA sell an elephant drain kit for a reasonable price?