trying to get more heat to certain section of building. boiler wp rated at 50 psi,circulating pump rated much higher. relief valve-only 30 psi. could i get higher presure releif vavle, turn up water pressure to about 45 psi to force more hot water to outer area.will it harm boiler. manuel sugests adjusting pressure. right now water pressure about 20 to 30 psi.