pressure relief valve

Maybe two or three times a week my PRV discharges water. I have the PVC pipe running into a 5 gallon bucket so it doesn't run all over the floor. It fills the bucket up about ever 4-5 weeks. Is this bad, or merely doing what it is supposed to do? Thank-You

Every day (for about 2 years) when the heating is on, I have to let water into my Worcester combi greenstar 28i boiler system. It drops to 0 again by the next morning. The pressure relief valve looks dry (i can't reach it to feel if it is wet) but there are no drips or water stains down the...