[Dave Willis]

There is no way thermboore will do that at 30 degrees.Its had 65 and up to produce that result.
             Daz so often you stated quite clearly on here that you use your water a hot as possible and I have been waiting for this to happen. Thermobore has polyurethane as a mane component which is only good till 65 degree after that the wall will loose its structure. Just watch that yellow hose fall apart.  You will have to use a hot, power washer hose next and that`s very heavy.
          Thank God its the hose that went and not you heater. Its just a matter of time before someone blows up his heater and has a major problem.
           I have watched my pump push water into my system for 30 seconds after I close the pole tap and often thought it quite dangerous as the heater system has a 3.5 lit ( 7 lit a min pump) excess as well adding heat before it shuts off the pump and then the boiler. The pressure must be enormous.

This is why I pull my water through rather than push. No pressure on the boiler at all.

[James Bulton]

There is much confusion about flow and pressure. Heater are regulated by the pressure which will be high pressure with a low flow will still make very hot water. Flow is the amount of water passing through the boiler and the longer it stays in the boiler the hotter it will be. e.g you can have a 100 psi and a flow of 3 liters a min which will core out of the boiler very hot. I have a 5 liter a min boiler and a 100psi pump and at 7 liters a minute PUMP it will never boil. If I turn my flow down, my psi is still 100 but my flow is 3 liters a min and  it will get very hot. So flow does have a very important role is heating water. The psi is the head of the water. e.g. pushing the water up a high pole+PSI

[jarvy]

There is no way thermboore will do that at 30 degrees.Its had 65 and up to produce that result.
             Daz so often you stated quite clearly on here that you use your water a hot as possible and I have been waiting for this to happen. Thermobore has polyurethane as a mane component which is only good till 65 degree after that the wall will loose its structure. Just watch that yellow hose fall apart.  You will have to use a hot, power washer hose next and that`s very heavy.
          Thank God its the hose that went and not you heater. Its just a matter of time before someone blows up his heater and has a major problem.
           I have watched my pump push water into my system for 30 seconds after I close the pole tap and often thought it quite dangerous as the heater system has a 3.5 lit ( 7 lit a min pump) excess as well adding heat before it shuts off the pump and then the boiler. The pressure must be enormous.

This is why I pull my water through rather than push. No pressure on the boiler at all.

I tried having my pump after the heater, could not get it to work.
As soon as I moved it before the heater it worked no problems. Maybe the pump is the key, only have sureflo pump 5lpm.

[Dave Willis]

That's what I've got. Don't get any problems now. Used to get so much pressure in the boiler it would blow hot water out of the valve underneath.

[LWC]

Ive got standard hose but i put a loop back into the tank before reels, so when i uplug the hot isnt still pumping round the reels and dumping back to the tank.

I learnt this from years ago when my 6mm microbore blew up to the size of a garden hose lol. Need to release that pressure somewhere.

[Scrimble]

i just adjust the de detection on the controller, when the hose is cold first job in the morning i have to turn the de up, when using hot i shut off the flow and within 5 seconds the pump stops,  never have i once on any microbore or thermobore hose have i broken one

Dazmond your obviously doing something wrong, either too much presure (likely) or too much heat (not likely)

[Lee Pryor]

we use gardiner 8mm red thermobore up to 70 degrees and no problems. its thicker and tougher

[SherwoodCleaningSe]

I think it's a pressure problem. How long does it take for your pump to cut off once you stop the flow?

Time it at the beginning and end of day with the boiler switched on.  The reason why i say both ends of the day is the battery voltage can make a difference to how the flow controller works. It should take well under 10 seconds, if it's taking longer then it's pushing water through the boiler and it has nowhere to go, so the water in the boiler will rise to very high temperatures over 100c and yet not turn to steam due to the high pressure.  You then push the water around the hose reel parking it at various stages in the hose which is where it causes the damage.

I'd seriously consider using the pressure switch on the pump to control pressure and not the controller, you can still use a controller to control flow speed. A pressure switch is far more stable at controlling pressure than an electronic controller in my experience.

If you don't get it sorted with the 6mm the 8mm has the potential to be even worse due to more room for expansion, meaning greater time to build pressure.

Simon.

[robertphil]

u cud sell that piping on ebay- artistic /crafters project

[ben M]

Daz, i use the red thermobore 8mm, it is a great hose but i think your hose reel will be to small for a 100m 8mm

[dazmond]

ben i have a redashe koreel hi vis reel.im sure 100m will fit.the claber reel is my spare emergency reel with 100m of standard microbore on.ill be just using cold water until my new hose comes.

simon you could be right.it takes about 20 seconds after turning tap off at pole end before my pump shuts off!ill have a play with the dead end detection when i get my new hose.


regards


dazmond

[8weekly]

Daz, those don't look like Berghaus boots. 

[dazmond]

JCB black riggers from B&Q mate!keep feet nice and warm and dry!ill switch back to the bergaus ones in spring!