Just finished my first year sealing. Noticed on the last job I did the pump on my seal-rite 700 acting weird. Usually I take the tip out of my wand to lay a bead around the edges. I was having to turn the pressure up to 100 psi to get a decent amount of sealer to come out when 30-40 psi usually works. Also, I'm noticing some air leaking out of the pump. It's just not getting enough pressure. Never taken the pump apart but it doesn't look to difficult. Any thoughts on what it might be. I'm thinking maybe a torn diaphragm.