WrightChoice Selective Destratification Pump

A WrightChoice Micro Pump can be used for selective destratification and it works for any hot water cylinder. They break down thermal stratification—the layering of hot water on top and cold water at the bottom, simply by circulating water. It pulls cooler water from the bottom and moves it to the top to be heated, ensuring the entire volume of the tank reaches a usable temperature. This process is highly effective for increasing the available hot water volume, particularly in systems using solar PV diverters.

This review deals with how to create your thermal store. Click on this link to read about why you should have a heat store.

WrightChoice Pumps can be installed as a retrofit in minutes, and they transform an existing vented or unvented cylinder into a heat store. There is no need for an electrician or a specialist plumber because the transformer just plugs into a 3 pin socket and everything is outside of the cylinder.

Frequently Asked Questions

Can you fit it to any hot water cylinder? – Yes, the pump can withstand pressures higher than any of our competitors so its suitable for vented and unvented cylinders. Our range of pumps can withstand 20 bars.

 

Why are the pumps so cheap? – You do not need a big expensive pump to selectively de-stratify a hot water cylinder (in fact big pumps mix up everything) – A micro pump will not only do a better job, it’s also more robust, it has a longer life, and the real question is – Why do customers spend more money on inferior alternatives?

 

What’s included with a WrightChoice Selective Destratification Pump?

In the Box:-
1 number WrightChoice Micro Pump
2 number 15mm connectors with washers
1 number 10mm to 15mm valve
1 number 1.5 amp Transformer
2 metres of 10mm Wavin Hep2O plastic pipe
2 number inserts for plastic
1 number 22mm compression slip joint
1 number 15mm x 22mm compression tee.

Not included is a 24 hour timer will allow you to store off-peak rate electricity as hot water and whitch can be bought locally for as little as £5.

Is the job really a DIY Solution? – The work can be done without draining the hot water cylinder by following the following instructions.

Gravity Systems

Installation (30 minutes Approx)

1- Turn off the valve between the cold tank and the hot water cylinder and the cold feed to the header tank
2- Turn on a hot and cold tap and keep them open until the water flow stops.
3- Fit the 10mm x 22mm x 22mm compression tee and the 10mm plastic pipe (with a pipe insert).
Use the 22mm slip joint only if there is limited movement in the existing 22mm pipe.
4- Cut the 22mm pipe feeding the hot water cylinder and deal with any water in the cold pipe above.
5- Fit the 15mm x 22mm x 22mm compression tee, the WrightChoice Micropump, and the 15mm x 10mm valve, and connect in the plastic pipe (with a pipe insert)
6- Open the feed to the cold water tank to start filling it.

Commissioning

1 Turn the pump on and open the 10mm valve fully for a few seconds, close the valve fully with the pump running, and then open it slightly. The aim is to reduce the flow to around 1.5 litres a minute. It’s not a precise flow but anything below 3 litres a minute will ensure the cylinder is selectively stratified and this avoids fully mixing the top hot water and bottom cold water in the cylinder.

 

Please note that the excessively high flows caused by a power shower will mix the hot and cold water within the tank in seconds and for that reason we strongly recommend that if you do have a traditional power shower you switch to a ShowerPowerBooster.

 

Unvented Cylinders

Simply close the cold water feed to the hot water cylinder and connect the cold inlet to the hot outlet.