I needed my rental water tank replaced but the way the builder had set up my furnace, there was very little room to put in new pvc venting. The service men had to leave and they were going to send other techs in a week, and it was going to be very costly. A half hour later, they came back because they had come up with a plan as long as my husband could run out to home depot and buy a few things. Bada boom, bada bing! Done. Only cost was materials. Great guys.