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The smallest diameter in the system
The smallest diameter in the system
The design is reasonable, and I agree that the expected pressure drop would be well below what you are experiencing. Assuming that your over-reading pressure gauge is accurate and you do have >22 psi, then either the pressure drop through the heater is excessive, or you have a blockage somewhere. Can you install a pressure gauge either just before or just after the heater?
Thank you all for your help and advice.I made a slight error on my original post ; the smallest diameter in the system is a 20mm (3/4
2011-08-09
