[nokmond]

http://www.virtualvillage.co.uk/12v-15a-pwm-dc-motor-speed-control-regulate-rc-model-003601-055.html?utm_source=googlebase&utm_medium=shcomp

Anyone tried it?

[Steven Shoreditch]

I'm glad it comes with a numpty, usually a numpty comes, and that's it.

It'll burn out i about 12 seconds I reckon.

Sorry.

[Tom White]

An educated neighbour of mine installs reverse osmosis units in cruse ships and in large posh houses in the Bahamas and the like; and he knows his stuff about water tanks, pumps, and everything to do with water.

He reckons impeller motors (such as the Shurflo) are designed to be worked hard and that by running them at half speeds can damage them.

Can anyone expand upon this?

[dd]

Maybe a solution would be to have a pump that produced around 3 litres/minute instead of the 5 litres or so that the shureflo and flojet pumps produce and not  use a pump controller at all. Just have an on/off tap on the hose to help conserve water.

[mci services]

Tosh I think that is why one supplier uses a bypass system to control the flow where the water just circulates when the tap is turned off. I just use full flow anyway with no controller as when even when I had the bypass set up I always had it on full anyway.

[H S and Son]

I have one on full bore with no ccontroller too. It's a great way to work. Sod running it on 35 or 4O.

[Tom White]

I tried that - full on - no restriction on the flow.  You can work really fast.  But when you stop the flow to speak to a customer or something, and then go back to work, it's like a powerwasher and splashes everywhere for a few seconds.

It's probably my inexperience, but I didn't like it.

[mci services]

I tried that - full on - no restriction on the flow.  You can work really fast.  But when you stop the flow to speak to a customer or something, and then go back to work, it's like a powerwasher and splashes everywhere for a few seconds.

It's probably my inexperience, but I didn't like it.

yes it is only for a few seconds though so I make sure the brush is on the glass away from seals then crack on as normal. You can adjust the pressure switch to kick in sooner though so the pump turns off quicker and doesn't build up as much pressure.

[dai]

They do work, I built a pump box with one of those a year ago.
When you think about it a backpack has a speed controller that works on a similar principle.
In practice it's only the top third of the speed range that's any use to us, any less and it slows to a trickle.

[Spruce]

An educated neighbour of mine installs reverse osmosis units in cruse ships and in large posh houses in the Bahamas and the like; and he knows his stuff about water tanks, pumps, and everything to do with water.

He reckons impeller motors (such as the Shurflo) are designed to be worked hard and that by running them at half speeds can damage them.

Can anyone expand upon this?

We have 3 Shurflo pumps between the 2 of us on Varistream Flow Controllers. The first has lasted 5 years, the second 4 years with 'continous' use and the 3rd is 3 years old with occassional use. Never had a problem with them except the pressure switch on the first 1 which is why we have them on Varistreams now bypassing the pressure switch on the pump.

[♠Winp®oClean♠]

An educated neighbour of mine installs reverse osmosis units in cruse ships and in large posh houses in the Bahamas and the like; and he knows his stuff about water tanks, pumps, and everything to do with water.

He reckons impeller motors (such as the Shurflo) are designed to be worked hard and that by running them at half speeds can damage them.

Can anyone expand upon this?

I thought they were "diaphram" pumps? Impeller pumps are like central heating pumps etc.

[Tom White]

You could be right, Win.

[♠Winp®oClean♠]

You could be right, Win.

Tell your "educated " neighbour to go back to school!

[mci services]

An educated neighbour of mine installs reverse osmosis units in cruse ships and in large posh houses in the Bahamas and the like; and he knows his stuff about water tanks, pumps, and everything to do with water.

He reckons impeller motors (such as the Shurflo) are designed to be worked hard and that by running them at half speeds can damage them.

Can anyone expand upon this?

We have 3 Shurflo pumps between the 2 of us on Varistream Flow Controllers. The first has lasted 5 years, the second 4 years with 'continous' use and the 3rd is 3 years old with occassional use. Never had a problem with them except the pressure switch on the first 1 which is why we have them on Varistreams now bypassing the pressure switch on the pump.

pressure switch only cost £1.80 or so to replace and takes minutes, and if needed can be protected by a relay if you don't want to pay out £1.80

[♠Winp®oClean♠]

I used to use a bypass system, with the "lever" valve. The reasons I now use a varistream are-

Constant, reliable flow- no matter how high or low the brush is.

Pump runs slower thus battery lasts a LOT longer.

Very accurate cut off.

Basically, once "set up & tuned" correctly- switch on & forget about it, your perfect flow & pressure, rock solid, day in day out. No running back to the van to alter anything!

[jonboywalton75]

I'm glad it comes with a numpty, usually a numpty comes, and that's it.

It'll burn out i about 12 seconds I reckon.

Sorry.

I've been using one with a 5lpm Vyair pump, works perfectly. Tha's since Nov last year BTW.

[Steven Shoreditch]

Has it an on/off switch?  Maybe it's on the dial numpty?

[GoodFella2006]

That is also what i've been using with my 100psi Shurflo pump/car battery.

No problems yet.