My Raypak 5450 heat pump was plumbed in a few days ago. I would have plumbed it myself but used a local CPC for warranty purposes. A flowvis, bypass, and waste port were also added in addition to a replacement ball valve for the inlet from my main drain. After the work I noticed the PSI on my filter guage jumped to just shy of 20 where I was in the 10/12 range prior. Is this normal / anticipated? My system is 1.5", the Raypak uses 2". Thanks!