Last year my clean filter pressure was around 14psi and I would normally backwash when it hit 17 or so. I've started opening the pool (last weekend) and I've noticed the filter pressure is 20psi. I did notice that the off pressure wasn't 0psi so I'm thinking it might be an issue with the gauge. I can put a new one on it but the pool is only 3 years old, we purchased the house last year.
Any ideas?
Any ideas?