I’m replacing my 20 year old equipment and have settled on a complete Pentair setup after a lot of reading here at TFP. I really liked the Autopilot system and it's great features, but in the end I decided the simplicity of a single controller works best for my needs (I'm going with the Intellitouch i7).
So here is my question, I’m going with a Pentair Intellichlor IC40 SWG plumbed in after a Pentair MasterTemp 400HD Heater. Now the Intellichlor instructions (and my three calls to the factory) confirm you have to have the IC40 3 feet from the heater outlet. Then they require 12"-18" straight pipe run before the IC40 and then about 12" straight after the IC40.
I looked at the alternate installation suggestion, a Bypass Loop, for when flow is over 80 GPM, as the diagram shows a small loop. However, I spoke with the factory and they confirmed the diagram is misleading and the Bypass Loop style install still requires the same 12"-18" straight pipe runs. I’m going with the Intelliflo VS so I can keep the flow below 80 GPM If I need to.
So using their required dimensions, my design shows I need almost 9 feet of pad space. That's almost 3 feet for the length of the heater, 18" to cover the required 3 feet out of the heater for the lead in pipe to the SWG (this is comprised of 18" out of the heater and then a 18" vertical upright, which includes the required check valve.) This puts the length so far at about 4 1/2'. Next comes the required 18" straight lead in pipe to the SWG, 16" for the SWG itself and then 12" lead out pipe and elbow, for an additional 4 1/2'. All of this totals to a required 9 feet of pad space (this includes a little extra for fittings).
After reading many posts here I understand the importance of minimizing head loss by a good plumbing design. If I really need to go this way I will, but I just wanted to get others opinions and recommendations about the required pipe lengths before and after the Intellichlor unit or any other comments are welcome?
Thanks for your help, Tom