2 pumps on different pipes

grousedogtom

Hi, i recently got a stove fitted to heat rads along with an existing oil fired Stanley cooker, we changed the system from a closed system to an open system with an expansion tank etc, the circulating pump on the Stanley was originally connected on the flow pipe now the plumber fitting the stove didn't realize this and fitted his pump for the stove on the return pipe, will this set up have an implications while both systems are running together? thanks in advance

puzzle factory

i duno

DoneDL

No fitting the pump on the return would not cause any problems, from memory most ranges had the pump on the return.

Stove Fan

grousedogtom wrote: »

Hi, i recently got a stove fitted to heat rads along with an existing oil fired Stanley cooker, we changed the system from a closed system to an open system with an expansion tank etc, the circulating pump on the Stanley was originally connected on the flow pipe now the plumber fitting the stove didn't realize this and fitted his pump for the stove on the return pipe, will this set up have an implications while both systems are running together? thanks in advance

Thats how most are plumbed in. So long as the plumber fitted the pump the right way on the return pumping towards the stove. Arrow on pump body pointing to stove.

Stove Fan:)

grousedogtom

Stove Fan wrote: »

grousedogtom wrote: »

Hi, i recently got a stove fitted to heat rads along with an existing oil fired Stanley cooker, we changed the system from a closed system to an open system with an expansion tank etc, the circulating pump on the Stanley was originally connected on the flow pipe now the plumber fitting the stove didn't realize this and fitted his pump for the stove on the return pipe, will this set up have an implications while both systems are running together? thanks in advance

Thats how most are plumbed in. So long as the plumber fitted the pump the right way on the return pumping towards the stove. Arrow on pump body pointing to stove.

Stove Fan:)

Should there be any problems with one pump on the flow and one on the return?

heinbloed

Should there be any problems with one pump on the flow and one on the return?

Yes. In principle each pump creates an underpressure, a sucking force. This will reduce the boiling point of the water, it might suck in air as well, depending on the installation.

If steam is created by the thermal source and shoots through the pump your system is at severe risk.

Get a heating engineer in, as described so far your system is not capeable to be comissioned by a serious professional. Uninsureable.

aujopimur

Pump on the stove return is correct, the cold feed to it should teed directly and unrestricted into the return in front of the pump, ie between the pump and the stove.

grousedogtom

heinbloed wrote: »

Yes. In principle each pump creates an underpressure, a sucking force. This will reduce the boiling point of the water, it might suck in air as well, depending on the installation.

If steam is created by the thermal source and shoots through the pump your system is at severe risk.

Get a heating engineer in, as described so far your system is not capeable to be comissioned by a serious professional. Uninsureable.

OK thanks for replies,so if both pumps were fitted on the return pipes would this solve any problems?

grousedogtom

as described so far your system is not capeable to be comissioned by a serious professional. Uninsureable.[/QUOTE]

Hi sorry not sure what this part means?

heinbloed

Grousedogtom asks:

as described so far your system is not capeable to be comissioned by a serious professional. Uninsureable.

Hi sorry not sure what this part means? [/QUOTE]

All installations should be safe to operate. If a system was installed which could not be operated safely (due to it's design) no insurance would cover any damage caused by it.

grousedogtom

Ok so if i get both pumps fitted on the flow or the return would that be correct?

heinbloed

No. Contact a plumber.

JohnnieK

There wont be a problem providing both appliances are not running at the same time and the pipe work has been installed correctly. If you have both on at the same time there will be a fierce amount of circulation pressure from both pumps running simultaneous, this will cause pitching and inefficiencies. Was it a plumber that installed it for you?