This is an odd one, I think: my (brand new) pump is fairly loud, with a constant high-pitched sort of rattle. I added two solar heating panels with a standard 3-valve bypass, and when I close the bypass and push the water through the heaters... the pump instantly gets much quieter, even though it's obviously working a lot harder. See here:
Any idea what would cause this? The pump is very close to the pool and honestly its job is pretty easy. Maybe this pump just prefers a bit more resistance?
![streamable.com](https://cdn-cf-east.streamable.com/image/09z5nt.jpg?Expires=1615419780&Signature=Y5cEY4f8NYOOFiMY80pnW~IE5~npJa4xlII3UTkf4~BRcDwNAXViQQHkRED7yF0xVGK0RIjPibS9DKYinBQVyaQdrfw6Tu2WGqbT1eUX9GHXeHFOBaw7-bd6upxFBAW5Ls8xWlQ7uDSv8q6EII9dPbQK7epDSyvUhKUHHIL7xefvIDeMJQTf-Jx2lXHLEUtS2lwXbN8Jc4YiiGXoJXKh8nFFS0CtQ9v3fPHqhrtVmlCgn6DufqMOG-9KRHcORs0GA4AWJB8Ex~~lfdqCsDZ5eOkHzlHYmrNNkwne1~AGmVv0LHb1UPXmQWKTHwqQsC4Cq7behMb4uYdWxFIqacZ2yg__&Key-Pair-Id=APKAIEYUVEN4EVB2OKEQ)
Any idea what would cause this? The pump is very close to the pool and honestly its job is pretty easy. Maybe this pump just prefers a bit more resistance?