Catchment tank installation built for Puna rain.
A complete catchment installation means sizing a tank to your roof and household, prepping a level base, plumbing it to your home, and adding full sediment, carbon, and UV filtration. For most Puna homes we install a 10,000–12,000 gallon tank, and the whole system typically runs $7,000–$20,000 depending on size, site, and filtration.
What a WaterWise installation includes
- System design & sizing — we calculate tank size from your roof area, rainfall, and how many people the home supports, so you never run dry.
- Tank selection — we help you choose between a galvanized steel tank and a poly tank based on budget, site, and how long you plan to stay.
- Site prep & base — a properly leveled, compacted pad so your tank sits stable and lasts for decades.
- Full filtration setup — a complete sediment → carbon → UV chain so the water reaching your tap is filtered and disinfected.
- Pump & plumbing — we connect the tank to your home with the right pump and pressure for steady flow.
- Walkthrough — we show you exactly how your new system works before we leave.
Galvanized vs. poly: which tank is right for you?
Galvanized steel tanks with a food-grade liner are the classic Big Island choice — they look at home in Hawaiian Paradise Park, handle our weather well, and can last 30 years or more with care. Poly (polyethylene) tanks cost less up front, install faster, and resist rust entirely, which some homeowners prefer. We'll walk your property and recommend the option that fits your budget and your site honestly — no pressure either way.
Why Puna systems need to be built right
In Hawaiian Paradise Park, Pahoa, and across Puna, your roof is your water source — and the climate is demanding. With 120+ inches of rain a year, VOG drifting in from Kīlauea, and constant organic debris off the trees, a catchment system here works harder than almost anything on the mainland. A tank that's undersized, sitting on a poor base, or missing real filtration will give you trouble for years.
That's why we size for your actual rainfall, prep the base properly, and never skip the sediment, carbon, and UV stages. Built right the first time, your system is something you can stop worrying about.
How it works
Free on-site design
We visit, measure your roof and site, talk through your household needs, and design a system sized for your home.
Prep & install
We level the base, set the tank, plumb it to your home, and build out the full filtration chain — most installs take a few days.
Test & walk you through
We pressure-test, confirm clean flow, and show you how to live with your new catchment system day to day.
What it costs
A complete new catchment system typically runs $7,000–$20,000, depending on tank size, your site's access and grading, and how much filtration you want. Permits and timeline vary by parcel, and we handle the paperwork so you don't have to chase it. The on-site estimate is always free and the quote is itemized and transparent — no surprises. Call or text 808-765-7234 for a free on-site estimate.
Common questions
What size tank do I need?
For most Puna households a 10,000–12,000 gallon tank gives a comfortable buffer through dry spells. We size yours from your roof area, rainfall, and how many people the home supports — never a one-size guess.
Do I need a permit?
Requirements depend on your parcel and setup. We're familiar with what East Hawaii expects and will guide you through any permitting and timeline as part of the project.
Is catchment water safe to drink?
Yes — with a properly built tank and multi-stage filtration (sediment, carbon, UV), catchment water is safe for drinking, cooking, and all household use. We build every system to that standard.
Related services
Thinking about a new catchment system?
Let's walk your property and design something built to last. The estimate is free and there's no pressure.