No changes made to the system lately but within the last week it seems we have 2 problems (or symptoms). 1) Two times we have lost pressure completely while someone was showering. The first time it was when the clothes washer was also running the second time it was when 2 showers were running No loss during multiple other solo showers, using faucets, etc. But it was as if water had just been turned off completely, and then within 10-25 seconds it was back again. In watching to try and see if it would reoccur, I noticed 2) the shower seems to be pulsing between full pressure to half pressure you can watch the water be full blast from the shower head and then drop back a little and then shoot back out further in a pulsing type pattern Similarly, it seems our toilet is refilling in pulses as well after a flush; you hear it run, stop for 1/2 sec, and run again several times before it's full Trying to figure out whether pressure switch is going bad, tank issues, or what?? Since hot & cold in shower and cold only to toilet, I doubt hot water heater is in this mix. Thanks.