$750 off Solar Hot Water installation NOW

30% Federal Tax Credit ends December 2019




The Big Islands Best Solar Hot Water Installers. Locally owned and operated, we've been serving the Big Island community since 1990.  We provide quality solar, excavation, and plumbing services at affordable prices. Whether you're looking to reduce the cost of your electricity bill, need to install a new septic system, or plumbing for a remodel or new construction home, you can count on the experts at Drainpipe Plumbing & Solar to ensure the project is done right!


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All estimates are free and flexible according to materials and scheduling.

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The folks at Drainpipe are nothing short of amazing! They gave us a price for the septic system and a rough estimate for the grading. They handled all the permits and inspections.We can’t recommend this kama‘aina company highly enough!
— Mark Panek
35% State Tax credit, 30% Federal Tax Credit and $500 from HEEP. I also save $80 a month on my electric bill. Solar hot water from Drainpipe Plumbing is an obvious choice.
— Jerry Broughton (owner JB Electronics)
Your men were knowledgeable, polite, on time and they left the worksite clean. I want to thank you all for being the kind of company others should aspire to be. Best of all my HELCO bill is less than half what it used to be. A big Mahalo to your whole team.
— Ken and Mary Goodrich, Volcano


About Us

John Gapp moved to the Big Island in 1979.  He learned the plumbing and solar business in San Diego. Dreaming of good surf and hoping to start his new business, he moved to Kalapana Gardens. There he built his dream home, surfed Drainpipes and started his new company, aptly named Drainpipe Plumbing and Solar. With the belief that integrity, performance and customer satisfaction were the key to running a successful business.  Treat each customer as you would your own ohana.