Thor, or should that be Zeus?

[AndrewMawson]

Simple bypass from output to input - just a tap that can be opened gradually and you can set the pressure exactly as you want it. This was standard practice on the main Grundfos 3 kW pumps that circulated water in my Launderettes when I had them - simple gate valve and in that case a pressure gauge. High enough to fill a washing machine PDQ, but not high enough to bust the flexible hoses !

[Desertboy]

I would add a 2nd pump to circulate through the spindle then hook the chiller to a thermostat like this


A pond style water pump will work fine I have a box of 20 of them I can send you one for free if you want and will use less electricity than the pump in the chiller.

With a reasonable size res of 20l's the chiller will only need to run a few minutes in an hour and I bet that water pump in the chiller uses quite a bit of juice.

[Chaz]

I would add a 2nd pump to circulate through the spindle then hook the chiller to a thermostat like this


A pond style water pump will work fine I have a box of 20 of them I can send you one for free if you want and will use less electricity than the pump in the chiller.

With a reasonable size res of 20l's the chiller will only need to run a few minutes in an hour.

Thanks, appreciated however have bought one already. Will test it tonight and see how it runs.

[Chaz]

What size pipe do people use? 6mm OD?

I managed to get a lot more powerful pump, pushes a good amount of water but when I connect up my plumbing, it struggles to flow. I have turned an adaptor to go from 1/2 to 1/4 inch (roughly) but the hole might be too restrictive.

Should I move up to 8mm piping?

Thanks

[Chaz]

8mm ordered anyways to check. I'm not sure how free flowing the water should be through the spindle, I went as far as removing the pipes and I get a slow flow, so I dont think its that.

[Clive S]

8mm ordered anyways to check. I'm not sure how free flowing the water should be through the spindle, I went as far as removing the pipes and I get a slow flow, so I dont think its that.

I have known the spindle fittings to be blocked when they seal the top bit on. Take off the tubing and poke a small screw driver down the hole to see if it is restricted about 25mm down. I only use a 2 ltr tank and a very small fish tank pump around £3

[Chaz]

I have known the spindle fittings to be blocked when they seal the top bit on. Take off the tubing and poke a small screw driver down the hole to see if it is restricted about 25mm down. I only use a 2 ltr tank and a very small fish tank pump around £3

Thanks. I did think of that - I tried to blow into it but a bit limited in terms of space. The black grommit things were removed, wasnt sure if there could be anything else blocking.

[Clive S]

Thanks. I did think of that - I tried to blow into it but a bit limited in terms of space. The black grommit things were removed, wasnt sure if there could be anything else blocking.

If you put a temp. tank above the spindle with one pipe to the spindle and the other pipe lower down into a bucket and siphon the water it should run freely. I take it is one of the normal Chinese spindles