CH Pump to Garden hose

[GonzoRibbons]

Bit of an unusual request, but can any of the expert plumbers out there recommend an adapter, and it's correct name to join the following together?

I am constructing a hydroponic system for the garden, and want to utilise an old central heating pump, standard Grundfoss with shut-off valves already fitted.

The body of the two valves says 22mm.

I'd like to adapt this to the same external thread as an outside tap so I can fit quick-connect couplings to use a garden hose. (3/4"?)

Can I connect the 2 together with a 22mm to 3/4" adapter (if one exists) or do I need a length of copper pipe between, and a 3/4" union on the end?

Any assistance would be great.

 

[Chalked]

A heating circulating pump won't make any pressure.

 

[GonzoRibbons]

If the pump is level with the reservoir, and only has to raise the water about 1ft or so, will it still not work? I realise it's not a pressurised pump, it was just replaced after getting a new CH system, so I thought I could make good use of it.

Thanks for the quick response.

 

[Dotty]

It's not designed for fresh water. It'll rot and put contaminants in your water in no time at all.

 

[dancinplumba]

Hydroponics eh ? Wink wink nudge nudge, is it an indoor garden by any chance ?

 

[Dotty]

Thought had crossed my mind too Steve.

Think I'll drop out of this one......

 

[Chalked]

Are you just circulating the water? If so fit the pump below the reservoir level. these pumps will not self prime.
if you need a fitting to adapt to the hose, they are 3/4 bsp. You could fit a short price of copper tube after the pump valves and use a 3/4 male to 22 mm compression fitting.
Conex Male Coupler 302 22mm x ¾" DZR | Compression Coupling | NoLinkingToThis

good luck growing the drugs.... Sorry meant flowers :wazzzup:

 

[dancinplumba]

WhatWhat about this ? http://www.toolstation.com/m/part.html?p=67242
CH pump will corrode

 

[GonzoRibbons]

Thanks for the suspicion guys.No, outside, tomato plants, very simple flood/drain system on a timer. Pump under an enclosure for protection, hanging basket type tomato plants.

croppie, I'll take your advice about the fresh water issue. Looks like I might have to buy a pump and re-think.

chalked thanks for the connector info, might use just as a test rig to get up and going, then replace pump when all works.

 

[GonzoRibbons]

WhatWhat about this ? <link>
CH pump will corrode

Looks like a good alternative, thanks for the heads up

 

[zzzjim]

....
CH pump will corrode

But I'm sure plants will get a good dose of Iron

( or was that the non plant version of rust ?)

 

[GonzoRibbons]

Thanks for all the responses, think I'm sorted now