That’s right, he uses a nitrogen bottle you can buy from any welding supply house. Then he connects a nitrogen supply to the sprinkler system. Once the system is filled, Franz isolates the sprinkler system from the potable water supply with a check valve. Many times, the 10-minute supply controls the fire with little fire damage to the home. That is considered enough time to get out of the building. Don’t forget that NFPA 13D requires a minimum of a 10-minute supply of water. Franz developed a system whereby the water distribution system fills the sprinkler system and the standby tank of water. ![]() For a well system, it is cheaper to run a separate piping system for the residential sprinkler system.” My initial thought was, two piping systems, two pumps, how could this be cheaper?Īs I told you, Franz loves to tinker. Besides being involved in design, Franz tinkers as an inventor.įranz’s first comment was, “Forget about a multipurpose piping system.” This surprised me since a multipurpose piping system is the least expensive way to install a residential sprinkler system.įranz said, “It is the lowest cost if you have a public water supply. Franz lives in New Hampshire and has his own design firm that specializes in residential sprinklers. Then I started to talk to a good friend named Franz Hasse of Franz P. For normal operation of the plumbing system, the pump was so oversized that it would only run for a few seconds and constantly cycle.įriendly Help: That’s when I realized how stupid an engineer I really was. Unfortunately, the pump only needed to be that big when there was a fire. The first thing that happened was that the pump got real big. Then I started to design the pump and tank system. This would mean the storage of anywhere from 90–260 gallons of water. NFPA 13D requires a 10-minute supply of water to be stored in the building when connected to a well system. ![]() “How can you install a residential sprinkler system on a well system?”īeing the smart engineer, I sat down to figure out this easy dilemma. About five years ago, I received one strong statement of concern that prevented certain contractors from entering the business. ![]() When I stand on the soap box, I am often met with weak resistance. While I have been harping on plumbing contractors for years to get into the residential sprinkler business, we still have only a handful of contractors actively involved in the work.
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