Jr's Plumbing
Jr's Plumbing
From emergency repairs to planned renovations, Jr's Plumbing handles every aspect of residential and commercial plumbing on Kauai. Here's what we do — and how we do it.
At Jr's Plumbing, we offer a comprehensive range of plumbing services covering just about anything that involves water, gas, or drains in your home or business. We've been doing this long enough to know that most problems have straightforward solutions — if you have the right experience to identify them. That's where we come in. We diagnose correctly, we repair properly, and we help you understand what happened and how to avoid it in the future.
A kitchen or bathroom remodel is one of the most rewarding investments you can make in your home — and also one of the most complex from a plumbing perspective. Moving drains, rerouting supply lines, upgrading fixtures, and ensuring everything meets code requires a plumber who understands both the technical requirements and the practical realities of how people use these spaces every day.
At Jr's Plumbing, we work closely with homeowners, general contractors, and designers to make sure the plumbing phase of your remodel goes smoothly. We handle the complete scope: relocating or adding drain lines, running new water supply piping to different locations, installing new fixtures, connecting appliances like dishwashers and garbage disposals, and ensuring proper venting for all new configurations. We've handled everything from simple fixture swaps in existing locations to complete reconfigurations where every drain and supply line needed to be moved.
For bathroom remodels in particular, we often encounter older homes with original galvanized steel pipes that need to be replaced during the renovation. This is actually an opportunity — rather than simply patching an aging system, we can re-pipe with modern materials like PEX or copper, giving you better water pressure and flow for decades to come. We handle this scope regularly and can advise you on the best approach based on your home's specific situation.
Gas line work is among the most technically demanding and safety-critical areas of plumbing. A improperly installed gas line can leak — and gas leaks in an enclosed home are a serious safety hazard. That's why gas line work requires a plumber with specific certification, proper training, and a thorough understanding of the gas code. Jr's Plumbing is certified to install, repair, and test gas piping systems in residential and commercial properties on Kauai.
We handle the full range of gas line services: running new gas piping for appliances like water heaters, dryers, stoves, and outdoor BBQs; repairing damaged or leaking gas lines; detecting and addressing gas leaks; and performing pressure tests on new installations. We also handle dryer and stove conversion kits — converting appliances from one gas type to another, which is sometimes necessary when replacing older equipment.
If you smell gas — a sulfur or rotten egg odor — leave the house immediately and call us from a safe location. Do not operate light switches, appliances, or anything that could create a spark. We treat gas leak calls as the emergencies they are and respond as quickly as possible. Once on site, we use professional gas leak detection equipment to locate the source and repair it properly.
Water heaters are one of the most essential pieces of equipment in any home — and one of the most overlooked until they fail. Whether you have a traditional tank-style water heater or a modern tankless system, Jr's Plumbing handles installation, replacement, and repair for all types. We work on all major brands and fuel types including electric, natural gas, and propane.
Tank water heaters typically last 8-12 years in Hawaii's climate before efficiency drops significantly or tank failure occurs. If your water heater is within this age range and you're experiencing issues — no hot water, insufficient hot water, rust-colored water, rumbling or banging noises, or visible leaks around the base — it may be time for replacement rather than repair. We help you evaluate whether repair or replacement makes more sense economically.
Tankless water heaters are increasingly popular on Kauai, particularly in homes where space is at a premium or where owners want to reduce energy costs. Tankless units heat water on demand rather than maintaining a tank of hot water 24/7, which can significantly reduce energy consumption. We install tankless systems from all major manufacturers and can advise on sizing based on your household's hot water demand.
Backflow is a plumbing condition where water flows in the opposite direction through a pipe — potentially allowing contaminated water to enter the clean water supply. This can happen when there's a sudden drop in water pressure (from a main break, for example), causing a reversal in the flow of water. Backflow prevention devices are required by code in many situations to protect the public water supply from contamination.
Jr's Plumbing is certified in backflow testing, installation, and repair. We test existing backflow prevention devices to ensure they're functioning correctly — which is often required annually by county water authorities. We also install new backflow prevention assemblies when they're required by code, such as in irrigation systems, fire sprinkler systems, and commercial applications where cross-connection risks exist.
If your backflow device fails a test or shows signs of wear, we can repair or replace it. Backflow devices have internal components — check valves, springs, and seals — that degrade over time and can fail. Regular testing catches these issues before they become emergencies or code violations. We maintain thorough documentation of all testing and repair work for your records and for compliance reporting.
Hidden water leaks are one of the most damaging and costly plumbing problems a homeowner can face. A leak under a slab, inside a wall, or beneath a cabinet can go undetected for weeks or months, causing structural damage, mold growth, and water bills that spike without explanation. Unlike a leaking faucet — which is obvious and annoying — hidden leaks require professional leak detection to locate.
Jr's Plumbing uses professional leak detection methods to find the source of mysterious water losses without unnecessary destruction to your home. We use a combination of pressure testing, visual inspection, and thermal imaging where applicable to narrow down the location of hidden leaks. Once we've identified the source, we repair or replace the affected pipe section using the appropriate method for the pipe material and location.
Many older Kauai homes still have galvanized steel pipes — a type of plumbing common in homes built before the 1980s that corrodes internally over time, restricting water flow and eventually developing leaks. If your home has galvanized pipes and you're experiencing low water pressure, rust-colored water, or intermittent leaks, re-piping may be the best long-term solution. We provide honest assessments of whether repair or re-piping makes more sense for your situation.
Plumbing fixtures — faucets, toilets, showers, tubs, bidets, garbage disposals — are the parts of your plumbing system you interact with every day. When they work well, you don't think about them. When they fail — a dripping faucet, a running toilet, a slow-draining sink — they become a constant source of irritation and, in the case of toilets, a significant source of water waste.
Jr's Plumbing handles fixture installation and repair for all types and brands. We install new fixtures as part of remodels and renovations, and we repair or replace existing fixtures that are failing. We work on everything from standard builder-grade fixtures to high-end designer fixtures from brands like Kohler, Delta, Moen, and Hansgrohe. If you buy a fixture yourself, we can install it — and if you need help choosing the right fixture for your needs and budget, we're happy to advise.
Some fixture issues are deceptively simple. A running toilet, for example, is often caused by a worn flapper valve or a faulty fill valve — a $10-$20 part that takes 20 minutes to replace. But a running toilet can waste over 200 gallons of water per day, which shows up on your water bill quickly. We always tell customers when a repair is simple and affordable versus when replacement makes more long-term sense.
Jr's Plumbing is based in Kapa'a and serves residential and commercial customers throughout the island.
No — we provide free estimates for all planned work including renovations, remodels, re-piping, and new fixture installation. For diagnostic calls where we need to investigate a problem, there's typically a service call fee, but we always discuss pricing before doing any work.
Yes. Jr's Plumbing is a licensed plumbing contractor on Kauai, and we carry full liability insurance protecting both our team and your property. We can provide proof of insurance for contractor or lender requirements.
Common signs include: consistently low water pressure throughout the house, rust-colored or muddy water coming from faucets, pipes that bang or hammer when turned on or off, frequent leaks in different locations, and pipes that are visibly corroded or greenish in exposed areas. If your home was built before 1985 and has never been repiped, it's worth having us evaluate it.
We install all major brands including Rheem, Rinnai, AO Smith, Bradford White, and Navien. We're brand-agnostic — we'll install whatever brand suits your needs and budget, and we're happy to help you choose.
Yes. If you have an active water leak, gas leak, or other urgent plumbing situation, call us immediately at (808) 822-4161. We'll do our best to respond as quickly as possible.
Call us today for a free estimate on any of our services. No obligation, no pressure — just an honest conversation about your plumbing needs.
(808) 822-4161