Water Top Up Valve

Crackingjob · Post by **Crackingjob** » Mon Sep 10, 2012 12:24 pm

Re Mamod SL1
The Water Top Up Valve which allows water to be pumped into the boiler a little at a time during running, is leaking.
The silicon band is torn.

Rather than buying a new valve at £8, can I obtain silicon tube to replace the torn section??

Any ideas

Crackingjob

Narrow Minded · Post by **Narrow Minded** » Mon Sep 10, 2012 12:29 pm

Indeed you can - I can't for the life of me remember who supplies it from "the trade" (maybe Forest Steam?), but a suitable alternative should be available "off the shelf"

maxnod · Post by **maxnod** » Mon Sep 10, 2012 12:34 pm

R/C Model Aircraft suppliers?

Crackingjob · Post by **Crackingjob** » Mon Sep 10, 2012 12:38 pm

Thanks..but...anyone as I hate searching the web inter wots its name

Chris Cairns · Post by **Chris Cairns** » Mon Sep 10, 2012 3:35 pm

Silicone Tube, ideally Inside Diameter 2mm and as thin walled as possible, max Outside Diameter 5mm, otherwise it will not enter the boiler insert.

Most radio control fuel silicone tubing is a bit thick walled, but if this posting has the correct sizes it should do - http://www.ebay.co.uk/itm/White-Silicon ... 4cfe7c6125

Make sure you clean up the shaft prior to fitting the tubing (I use some brasso for this) and cut the tubing a little shorter in length than the shaft - gives a better water tight seal.

Chris Cairns.

DLRdan · Post by **DLRdan** » Mon Sep 10, 2012 5:54 pm

Alternatly you can use the pnuematic tube from lego technic sets. I've had a piece in one of my locos for years without any problems.

Crackingjob · Post by **Crackingjob** » Mon Sep 10, 2012 8:19 pm

Thanks all, I have spoken to the nice people at Dream Steam and have replacements...got to buy something now!!!!

Actually when I get paid, its a new pump bottle and cylinder upgrade

Thanks for all the suggestions etc

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