Give your sweethearts the gift of comfort. Ask about our Signature Series line of premium heating and cooling equipment. of Black Diamond Plumbing Sewer Electric HVAC There when you need as FREE BYPASS HUMIDIFIER With Signature Series FULL System purchase. Schedule a free estimate for full details. Cannot be combined with other offers or used on previous service. Expires 3/15/23 NW0223 $30 OFF ANY SERVICE CALL Offer valid for services over $100. Cannot be combined with any other offer. Coupon must be presented at time of service. Cannot be used towards backflow testing, maintenance agreements, previous services, diagnostic trip fee or afterhours/holiday fee Expires 3/15/23 NW0223 License # 058-140555 Give your sweethearts the gift of comfort . Ask about our Signature Series line of premium heating and cooling equipment . of Black Diamond Plumbing Sewer Electric HVAC There when you need as FREE BYPASS HUMIDIFIER With Signature Series FULL System purchase . Schedule a free estimate for full details . Cannot be combined with other offers or used on previous service . Expires 3/15/23 NW0223 $ 30 OFF ANY SERVICE CALL Offer valid for services over $ 100 . Cannot be combined with any other offer . Coupon must be presented at time of service . Cannot be used towards backflow testing , maintenance agreements , previous services , diagnostic trip fee or afterhours / holiday fee Expires 3/15/23 NW0223 License # 058-140555