• Welcome to PlumbersForums.net - The international free plumbing advice forum. Professional plumbers sharing advice with fellow plumbers and DIY alike. Register for free today! - Checkout the Plumbing Advice forum and then our Plumbing Videos area which still needs populating.

From the United States of America? - Checkout our specific plumbing forum for you:USA Plumbing Forum

Discuss Expansion like vessel in the Water Underfloor Heating Installations area at PlumbersForums.net

Messages
28
Currently installing air to water and underfloor.theres this expansion like vessel with two 3/4 iron male threads on top and bottom of it with no bladder on between.its goes before the primary flow hits the cylinder and underfloor manifold.anyone know of its function??we don't do alot of air to water installs.be gratefully for a reply
 
Messages
2,034
Currently installing air to water and underfloor.theres this expansion like vessel with two 3/4 iron male threads on top and bottom of it with no bladder on between.its goes before the primary flow hits the cylinder and underfloor manifold.anyone know of its function??we don't do alot of air to water installs.be gratefully for a reply
Photo? Size?
 

SJB060685

Plumber
Messages
2,017
The idea of a flow through expansion vessel is to prevent stagnation water and potential build up of legionella bacteria. The water is constantly moving through one of these vessels, rather than staying put and becoming a risk. As Shaun says usually on hot water circuits but will work just the same in a heating circuit.
Remember the vessel creates the point of no pressure change and should be sited in the correct place.
 
Messages
28
The idea of a flow through expansion vessel is to prevent stagnation water and potential build up of legionella bacteria. The water is constantly moving through one of these vessels, rather than staying put and becoming a risk. As Shaun says usually on hot water circuits but will work just the same in a heating circuit.
Remember the vessel creates the point of no pressure change and should be sited in the correct place.
So even when there's no pump circulating
 

SJB060685

Plumber
Messages
2,017
The point the vessel tees into the system is the point of no pressure change when the circulating pump is energised. Ideally you want the vessel on the return back to boiler with the pump shortly afterwards.
 

Reply to Expansion like vessel in the Water Underfloor Heating Installations area at PlumbersForums.net

New Posts Threads Members

Top