[davids3511]

Just went to purchase a new 100m minibore from Gardiner but noticed - Not for use with 'Hot Water Systems'. Anybody any idea why? I am just about to fit a fogwash and need new hose.

[Dave Willis]

It's very good but rather supple which is great. Trouble is the heat makes it even more supple and so tends to expand with heat and  pressure.

[davids3511]

So what do people use for hot then?

[Pope vader]

none of the brushes are recommended for hot either

[Dave Willis]

My old microbore seems pretty good with the heat.

[steven ainger]

I use streamline, with hot, with no problems

[SherwoodCleaningSe]

I'd say that their hoses are the best you can buy for cold, but with hot they do inflate too much and also become very stretchy.  I'm using brodex heavy duty which is ok but far from perfect.

I've found that the medium stiffness bristled brushes are ok, they do loose their shape but they still clean well, especially with hot.

Simon.

[Spruce]

Alex made a reply to someone on another forum with a very detailed explanation as to why their minibore hose didn't handle hot as well as cold.

He said that they have never recommended standard Minibore or Microbore for Hot Water Systems. Whilst some clients can 'get away' with using it, a lot depends on the temperature used. Many Hot Water users regularly have 70°going into the reel which then increases the strain that standard hose is under -The initial purge of water on some systems can even be up to 90°. On the other hand some users only use about 30-40° which has a dramatically different effect on the hose.

Alex also says that their Microbore is actually tougher than the new slimline Minibore, but they stilll do not recommend it with hot water.

I have recently replaced my old hose bought from Cleantech 5 years ago with some from Gardiners.

The cleantech hose was very much stiffer than this new hose from Gardiners.

With the original hose there was usually a delay when my Varistream activated the pump after the tap was opened. Now the hose, being a little more flexible swells a bit with the pressure, and so I no longer get that delay as the hose acts as a reservoir.

At first I wasn't too sure, but now I find the hose great for cold water.

From the other posts on the subject of late, I think the majority of hot water users use microbore.

Spruce

original post edited later

[Dave Willis]

idealy you need two hoses - one for hot and one for cold. Anyone converting to hot will find that the heat magnifies any leaks or poor joints in the system. Pressure needs to be adjusted accordingly to match the hose swelling. Something you can't monitor round the back of a large property. It takes a long time for any heat adjustments to reach the brush head too especially if you have 100m on a reel. The older stiffer hoses seem to cope the best.