Differences

This shows you the differences between two versions of the page.

Link to this comparison view

alfie:cc2:tap_sink [2018/08/06 22:41] (current)
jin created
Line 1: Line 1:
 +====== Tap & Sink ======
 +
 +In [[campering|Mk1]] we'd fitted a sink and grabbed a couple of plastic jerry cans for fresh & waste water but hadn't got as far as sorting out a water pump. Thanks to Mike scavenging bits and bobs from work, he gave us a ShurFlo 12v pump with pressure-sensing switch which is a nice bit of kit. We bought a caravan tap with internal switch from eBay.
 +
 +I decided to plumb it in using push-fit tubing as it's relatively cheap, convenient, and the tubing and fittings are quite compact.
 +
 +Drawback #1 was the caravan tap had hose-barb type connections,​ which meant the pipe needed to be 10mm bore. No problem, but 12mm outside diameter push-fit stuff is a //bit// more spendy than the usual 6mm stuff I use for things like axle breathers and diff locks - and the pipe is substantially more rigid too!
 +
 +Anyway, I bought a handful of push-fit adapters and a length of pipe from [[http://​www.hyphose.co.uk|Hyphose]] and set to it - cue much tinkering under the sink, getting a stiff neck, with water running up my sleeve. Test run #1 saw water peeing out of every joint, turns out the pneumatic fittings are machined for a different way of seating / sealing than the pump threads.
 +
 +So, out with the PTFE tape, re-make everything (//more tinkering under the sink, getting a stiff neck and wet sleeve//), fingers crossed seems to work OK...
 +
 +Having wrestled the (quite rigid) pipe onto the (very brittle plastic) tap, and wired the pump up, I discovered another flaw: The tap was a mixer tap, we were only using the cold side, but as you turn it on it "​mixes"​ the hot side as well. With no hot connection, the cold water shoots back out the bottom of the tap through the "​hot"​ pipe. Bugger.
 +
 +Another trip to [[http://​www.hyphose.co.uk|Hyphose]] for more push-fit bits and I had a tee made up to push water up both sides of the tap. More wrestling round under the sink with water running up my sleeve but it worked eventually. Winner! ​
 +
 +A day or two later I was looking at wiring the pump in properly, turned it on and discovered water spraying out under the sink again - aargh what now???
 +
 +{{ http://​fuddymuckers.co.uk/​gallery/​s/​300/​127_CC2/​crap_tap.JPG}} It turns out that the brittle plastic tap connector couldn'​t take the (quite gentle) pressure from the plastic hose bending to reach, and had snapped off overnight!
 +
 +Right, that's enough of that cheap junk, off to Screwfix for a standard kitchen tap, you get a pair of them for £15, they'​re solid metal, no pratting about.
 +
 +Cue further faffing about under the sink with water running up my sleeve to change everything over. Fired it all up and... it all leaks! Turns out even PTFE can't make dissimilar flanges seal properly.
 +
 +Not giving up yet, I bought some plumber'​s sealant, stripped everything back, applied sealant to all the threads, re-assmebled (yet more tinkering under the sink, getting a stiff sleeve and wet neck), tested it and IT STILL LEAKS. Aaaaarrrgh sodding thing.
 +
 +At this point, the plumbing was holding up the installation of the fridge and some other kitchen bits so I had to make a decision. Off to toolstation for a collection of 15mm JG Speedfit fittings and pipe - this is more cumbersome than the pneumatics stuff (and the pipe is MUCH stiffer) but I figure it should seal properly on "​domestic"​ threads. So, back to prolonged tinkering under the sink, getting a really stiff neck and soggy sleeve, and at long flippin'​ last we have a tap that doesn'​t leak! The downside is you HAVE to use 90deg fittings to turn corners, the pipe has very little flex, and I'm not sure we'll be able to get the fresh water tank in & out without actually disconnecting the fitting, rather than just pulling the pipe out of the neck of the jerry can. But what the heck, if it means we have a working tap I'm happy to be out from under the sink!
 +
 +**I do still need to make proper "​bungs"​ for the jerry can necks to stop water sloshing out when on the move**
 +
  
alfie/cc2/tap_sink.txt · Last modified: 2018/08/06 22:41 by jin
Driven by DokuWiki Recent changes RSS feed Valid CSS Valid XHTML 1.0