How to Identify a Primatic Cylinder?
The Bubble Is Compressed and Changes Position. If You Have a Cold Water Storage Cistern, a Hot Water Cylinder, and a Boiler, but No Feed and Expansion Tank or...
The bubble is compressed and changes position. If you have a cold water storage cistern, a hot water cylinder, and a boiler, but no feed and expansion tank or expansion vessel, it's quite possible that you have a primatic cylinder.
What is Primatic cylinder?
Single Feed (Primatic Cylinders)
Inside the cylinder is a baffle, which when filled, creates a trapped bubble of air. This air bubble separates the central heating water and domestic hot water. ... To reinstate the air bubble is simply a case of draining the central heating system down, and then refilling.
How do you drain a Primatic cylinder?
turn off the boiler and/or the immersion heater. close the cold feed to the cylinder and drain the system as normal. to re-fill, close the drain-off and open the cylinder cold feed and bleed the rads. DO NOT add any inhibitors or cleaning chemicals to the system.