Bigger grey water drain tap
My new motorhome has a grey water drain pipe of well over 20mm diam but it ends in a tiny 10 or 15 mm drain cock. It takes ages to drain and must be a sweetcorn trap! :-)
Can anyone point me towards a bigger drain tap?
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Any chance of a photo so we can see the problem ?
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The guy who designed it probably never gave it a thought he just wanted to put a tap on the end of a pipe and thats what he found. Most of these taps seem to be of similar size.
You could increase the pipe size after it comes out of the tank which would give you a bigger exit hole and then fit something like a plastic 40mm gate valve. You could add a 90 degree elbow to get it to point down.
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Think I would be worried about the other pipe thats hanging down. Looks like a trip to the Plumbers Merchants to see what they can come up with. The pipe that feeds the tap does not look very large. Our Laika has a 40mm pipe. Discharging tank takes minutes.
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I fitted a larger tap to my MH before our recent trip to Germany. Much improved draining performance. Why manufacturers fit such small bore taps is beyond me.
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Yes is a real pain. Mine is 3/4 inch right from the tank outlet so cannot do much about it. I also find the smaller bore is prone to blocking up so I carry an old length of TV coax cable which I use as an unblocker, it works. When the plastic drain tap handle broke, I replaced it with a remotely controlled metal ball valve controlled from the cab. Much easier to dump over a good MSVP now even if it takes a ages to drain a full waste tank. Usual procedure is open valve and while its draining, put more fresh water in or empty the loo or do both.
peedee
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peede ,yore rotating pictures make me dizzy !! What are you putting down to block ? No grease .sieve other stuff job done .
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Southdown Motorhomes for the tap. It's a fairly standard type of thing, probably available at many Caravan/MH dealers or on the net.
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Yes those small bore valves must be a real pain. My pipework is approximately 30mm-35mm into and out of the tank and a decent size valve.so no tank draining issues. The one puzzle I have is the flow from the kitchen sink.It is usually slow until I give it a couple of very light pumps with a traditional sink plunger. This works for a short time then slows up again. We're very careful about what goes down the plughole i.e. no fat or grease so why does it run freely then slow up again so quickly? Any answers anyone?
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a lot depends on the pipe run, our centrally sited kitchen and washroom drain directly downwards into a centrally mounted waste water tank via totally seperate pipes for the kitchen sink, the washroom sink and the two shower drains.....each has a seperate entry spigot on the waste tank....not surprisingly, the water drains quickly from each source....even on a slight slope.
i can see that it is tricky if the washroom isn't the rear and the tank is at the front....by why would any one design it that way?
re: the tank drain, our tank has a large bore drain with an internally mounted valve to avoid freezing of the water stored when a tap is on the end of a pipe. a small extra length of flexible pipe allows for a good aim with awkwardly sited drains.
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I have exactly the same problem. I have an Elldis Accordo and the blue water drain tap which is just the same as your grey water tap has become so stiff that I can't turn it anymore. I've done some research and I think it's a speedfit system. These fittings are available on Screwfix. I'm going to replace the tap with a shut off valve. I'll also lengthen the pipework a bit to make it easier to access. How did you get on with yours?
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18/6/2019 !!