--- title: "IS Plumbing" description: "IS Plumbing describes itself as a fully licensed and insured plumbing company based in Millbury, MA, serving homeowners across Worcester County, MetroWest " doc_version: "2026-09-28" last_updated: "2026-09-28" --- # IS Plumbing **Trade:** Plumbing · **Phone:** (774) 486-0909 · **Website:** https://isplumbingma.com/ · **Languages:** English **Rating: 4.8/5** (medium confidence) — from 28 reviews across 4 sources. 100% of sentiment-scored reviews read net-positive. Last 6 months: 28 reviews, 0 negative. ## The honest read IS Plumbing describes itself as a fully licensed and insured plumbing company based in Millbury, MA, serving homeowners across Worcester County, MetroWest and Greater Boston. Its Massachusetts plumber license 4735-PL-C is active on the state registry. Its website lists free estimates and 24/7 emergency service. A recent customer says IS Plumbing replaced their water heater, located a leaking ice-maker shutoff behind the kitchen cabinet, removed the unused ice-maker line, replaced old piping connections and fixed a leaking bathtub and shower valve in the same visit. Another says it replaced their water heater and updated the water piping, bought the materials, pulled the permit and met with the inspector. A third says that while the family was away, it installed a new hot water heater, descaler and emergency shutoff after the dad's heater leaked. One customer says IS Plumbing installed a new high-efficiency Viessmann boiler and that the project was completed on schedule. Another says it upgraded the controls on the steam heating system of their three-family building, installing a new digital boiler control and indoor and outdoor sensors. A third says it performed a complete boiler service and cleaning and installed a hot water recirculating system. A recent customer says IS Plumbing added a full bathroom to their basement and finished on time. Another says it replaced a leaking outdoor hose faucet and installed a new main water shut-off valve using soldered copper connections. One customer who hired it for a two-family gut renovation that took more than a year says Ilgiz and Sergey both carry engineering degrees and that the mechanical room is neat, with all pipes clearly labeled. **Strengths:** - Water heater swaps — replaced along with piping, permit and inspection handled - Boiler work — Viessmann install completed on schedule - Steam controls — digital boiler control and sensors on a three-family - Neat mechanicals — pipes laid out and clearly labeled after a gut renovation ## Claims & citations Every claim below is backed by real evidence rows — uncited claims are dropped in code before publication. - Describes itself as a fully licensed and insured plumbing company based in Millbury, MA, serving Worcester County, MetroWest and Greater Boston _(confidence: medium)_ - [Official Website](https://isplumbingma.com) — “About (self-reported, verbatim): IS Plumbing is a fully licensed & insured plumbing company based in Millbury, MA — serving homeowners acros…” - Massachusetts plumber license 4735-PL-C is active on the state registry _(confidence: high)_ - [State License Registry](https://occupationallicensingandpermitting.mass.gov/madol/s/license-search-page) — “MA plumber license 4735-PL-C registry-verified active — registry holder of record: IS Plumbing LLC” - A recent customer says it replaced their water heater and fixed a leaking ice-maker shutoff and a leaking bathtub and shower valve in one visit _(confidence: high)_ - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sCi9DQUlRQUNvZENodHljRjlvT2xSUE5rWkJWMUo2TmpGTFpYQldVMlJxZVdabFoxRRAB!2m1!1s0x0:0x43e515d46309ab00!3m1!1s2@1:CAIQACodChtycF9oOlRPNkZBV1J6NjFLZXBWU2RqeWZlZ1E%7C%7C?hl=en) — “5★ IS Plumbing did an excellent job replacing our water heater and resolving several other plumbing problems during the same visit. They loc…” - A recent customer says it bought the materials, pulled the permit and met with the inspector on a water heater and piping job _(confidence: high)_ - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sCi9DQUlRQUNvZENodHljRjlvT213MlgyeFJYMEp2YkhCM1VsZDVXa3QyZVhkdE0yYxAB!2m1!1s0x0:0x43e515d46309ab00!3m1!1s2@1:CAIQACodChtycF9oOmw2X2xRX0JvbHB3Uld5Wkt2eXdtM2c%7C%7C?hl=en) — “5★ I hired IS Plumbing to replace my water heater and update the water piping in my house, and the whole experience was much easier than I e…” - A recent customer says it installed a new high-efficiency Viessmann boiler, completed on schedule _(confidence: high)_ - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sCi9DQUlRQUNvZENodHljRjlvT25GRE0yOURRbXB2ZG04NFVUZEtWR3R4Ymxwc1gwRRAB!2m1!1s0x0:0x43e515d46309ab00!3m1!1s2@1:CAIQACodChtycF9oOnFDM29DQmpvdm84UTdKVGtxblpsX0E%7C%7C?hl=en) — “5★ I hired IS Plumbing to install a new high-efficiency Viessmann boiler in my home and was very pleased with the entire experience. The pro…” - A recent customer says it installed a new digital boiler control and indoor and outdoor sensors on a three-family building's steam heating system _(confidence: high)_ - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sCi9DQUlRQUNvZENodHljRjlvT21OV1lXdzJUR2xNTm5SRE1FZDRPRzh0WlZCNGRFRRAB!2m1!1s0x0:0x43e515d46309ab00!3m1!1s2@1:CAIQACodChtycF9oOmNWYWw2TGlMNnRDMEd4OG8tZVB4dEE%7C%7C?hl=en) — “5★ I hired IS Plumbing to upgrade the controls on the steam heating system serving our three-family building. They installed a new digital b…” - A recent customer says it performed a complete boiler service and cleaning and installed a hot water recirculating system _(confidence: high)_ - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sCi9DQUlRQUNvZENodHljRjlvT2xFeVZtWlNjbmN5V1hWTWNEUmlOQzF2VTBaaU0xRRAB!2m1!1s0x0:0x43e515d46309ab00!3m1!1s2@1:CAIQACodChtycF9oOlEyVmZScncyWXVMcDRiNC1vU0ZiM1E%7C%7C?hl=en) — “5★ Outstanding service from IS Plumbing! They performed a complete boiler service and cleaning, and also installed a hot water recirculating…” - A recent customer says it added a full bathroom to their basement and finished on time _(confidence: high)_ - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sCi9DQUlRQUNvZENodHljRjlvT2tKNmMzcDJNaTEzTkRKSmEyVTNUVGxaT0dOb2EyYxAB!2m1!1s0x0:0x43e515d46309ab00!3m1!1s2@1:CAIQACodChtycF9oOkJ6c3p2Mi13NDJJa2U3TTlZOGNoa2c%7C%7C?hl=en) — “5★ IS Plumbing did an amazing job adding a full bathroom to our basement! From the initial planning to the final installation, they were pro…” - A recent customer says it replaced a leaking outdoor hose faucet and installed a new main water shut-off valve with soldered copper connections _(confidence: high)_ - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sCi9DQUlRQUNvZENodHljRjlvT2taVlMzbFhNRGRVV0dWaVlqUlNUMWgyUjFaekxWRRAB!2m1!1s0x0:0x43e515d46309ab00!3m1!1s2@1:CAIQACodChtycF9oOkZVS3lXMDdUWGViYjRST1h2R1ZzLVE%7C%7C?hl=en) — “5★ IS Plumbing replaced a leaking outdoor hose faucet (sillcock) at my home. During the repair, they also identified that the existing main …” - A customer who hired it for a two-family gut renovation says the mechanical room is neat, with all pipes clearly labeled _(confidence: high)_ - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sCi9DQUlRQUNvZENodHljRjlvT25oNFVIbE5XRlp2UWt4eFgxbHlRVmhZTTBGQ1dYYxAB!2m1!1s0x0:0x43e515d46309ab00!3m1!1s2@1:CAIQACodChtycF9oOnh4UHlNWFZvQkxxX1lyQVhYM0FCWXc%7C%7C?hl=en) — “5★ I hired IS Plumbing for a large two-family gut renovation project, and despite the number of complications we've had to work through over…” - Specializes in Plumbing _(confidence: high)_ - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sCi9DQUlRQUNvZENodHljRjlvT2xSUE5rWkJWMUo2TmpGTFpYQldVMlJxZVdabFoxRRAB!2m1!1s0x0:0x43e515d46309ab00!3m1!1s2@1:CAIQACodChtycF9oOlRPNkZBV1J6NjFLZXBWU2RqeWZlZ1E%7C%7C?hl=en) — “5★ IS Plumbing did an excellent job replacing our water heater and resolving several other plumbing problems during the same visit. They loc…” - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sCi9DQUlRQUNvZENodHljRjlvT213MlgyeFJYMEp2YkhCM1VsZDVXa3QyZVhkdE0yYxAB!2m1!1s0x0:0x43e515d46309ab00!3m1!1s2@1:CAIQACodChtycF9oOmw2X2xRX0JvbHB3Uld5Wkt2eXdtM2c%7C%7C?hl=en) — “5★ I hired IS Plumbing to replace my water heater and update the water piping in my house, and the whole experience was much easier than I e…” - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sCi9DQUlRQUNvZENodHljRjlvT2taVlMzbFhNRGRVV0dWaVlqUlNUMWgyUjFaekxWRRAB!2m1!1s0x0:0x43e515d46309ab00!3m1!1s2@1:CAIQACodChtycF9oOkZVS3lXMDdUWGViYjRST1h2R1ZzLVE%7C%7C?hl=en) — “5★ IS Plumbing replaced a leaking outdoor hose faucet (sillcock) at my home. During the repair, they also identified that the existing main …” - [State License Registry](https://occupationallicensingandpermitting.mass.gov/madol/s/license-search-page) — “MA plumber license 4735-PL-C registry-verified active — registry holder of record: IS Plumbing LLC” - Also offers HVAC / Heating & Cooling _(confidence: high)_ - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sCi9DQUlRQUNvZENodHljRjlvT25GRE0yOURRbXB2ZG04NFVUZEtWR3R4Ymxwc1gwRRAB!2m1!1s0x0:0x43e515d46309ab00!3m1!1s2@1:CAIQACodChtycF9oOnFDM29DQmpvdm84UTdKVGtxblpsX0E%7C%7C?hl=en) — “5★ I hired IS Plumbing to install a new high-efficiency Viessmann boiler in my home and was very pleased with the entire experience. The pro…” - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sCi9DQUlRQUNvZENodHljRjlvT2xFeVZtWlNjbmN5V1hWTWNEUmlOQzF2VTBaaU0xRRAB!2m1!1s0x0:0x43e515d46309ab00!3m1!1s2@1:CAIQACodChtycF9oOlEyVmZScncyWXVMcDRiNC1vU0ZiM1E%7C%7C?hl=en) — “5★ Outstanding service from IS Plumbing! They performed a complete boiler service and cleaning, and also installed a hot water recirculating…” - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sCi9DQUlRQUNvZENodHljRjlvT21OV1lXdzJUR2xNTm5SRE1FZDRPRzh0WlZCNGRFRRAB!2m1!1s0x0:0x43e515d46309ab00!3m1!1s2@1:CAIQACodChtycF9oOmNWYWw2TGlMNnRDMEd4OG8tZVB4dEE%7C%7C?hl=en) — “5★ I hired IS Plumbing to upgrade the controls on the steam heating system serving our three-family building. They installed a new digital b…” - Also offers Bathroom Remodel _(confidence: medium)_ - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sCi9DQUlRQUNvZENodHljRjlvT2tKNmMzcDJNaTEzTkRKSmEyVTNUVGxaT0dOb2EyYxAB!2m1!1s0x0:0x43e515d46309ab00!3m1!1s2@1:CAIQACodChtycF9oOkJ6c3p2Mi13NDJJa2U3TTlZOGNoa2c%7C%7C?hl=en) — “5★ IS Plumbing did an amazing job adding a full bathroom to our basement! From the initial planning to the final installation, they were pro…” ## License Status: **active** (#4735-PL-C, plumber) — verified against the official MA state registry on 2026-09-26, never self-reported. Re-check at the official registry: https://occupationallicensingandpermitting.mass.gov/madol/s/license-search-page ## Sources - [Google](https://www.google.com/maps/search/?api=1&query=IS%20Plumbing&query_place_id=ChIJYc7A0xvdoiIRAKsJY9QV5UM): 5.0★ from 50 ratings - [Official Website](https://isplumbingma.com): Self-reported profile and service details - [Google Reviews](https://www.google.com/maps/search/?api=1&query=IS%20Plumbing&query_place_id=ChIJYc7A0xvdoiIRAKsJY9QV5UM): Listed on this source - [Exa](https://boilermag.com/is-plumbing-heating-loves-boilermag/): 0 web mentions across the open web (each linked to its source) ## Recent reviews - **5/5 · Google Reviews · Дульсинея Тобосская · 2026-09-23**: IS Plumbing did an excellent job replacing our water heater and resolving several other plumbing problems during the same visit. They located a leaking ice-maker shutoff behind the kitchen cabinet, removed the unused ice-maker line, replaced the old piping connections, and fixed our leaking bathtub … - **5/5 · Google Reviews · ilana steven · 2026-09-18**: We had an issue with our boiler that left us without hot water, and Ilan from IS Plumbing was absolutely fantastic. He was prompt, reliable, and honest throughout the entire process. He went above and beyond to track down the parts we needed and made it a priority to get everything repaired as quick… - **5/5 · Google Reviews · Boris Komarnitsky · 2026-08-25**: IS Plumbing responded quickly when my shower had only hot water. They came the next morning, replaced the shower valve cartridge, adjusted the temperature, and everything works perfectly now. Professional, reliable, and efficient. Highly recommend!. - **5/5 · Google Reviews · Sima G. · 2026-08-24**: I recently had a plumbing issue with my bathtub, and the experience was excellent from start to finish. The problem was diagnosed quickly, the work was done professionally, and everything was left clean and working perfectly. Reliable company, knowledgeable and responsive—highly recommend! - **5/5 · Google Reviews · Miriam Cerruti · 2026-08-23**: Great experience with IS Plumbing! Competent and fast, I would recommend them without hesitation! - **5/5 · Google Reviews · Lisa Piccolo · 2026-08-04**: IS Plumbing was amazing to work with! While we were away on vacation, my dad’s hot water heater leaked and they stepped in right away to help. They installed a new hot water heater, descaler, and emergency shutoff, and explained everything clearly throughout the process. Professional, responsive, an… - **5/5 · Google Reviews · Misha K · 2026-08-03**: IS Plumbing installed our new water heater, water filtration system, and scale-prevention system. They also investigated a natural gas pressure issue with our pool heater and provided a detailed report outlining the problem. Their workmanship was excellent, and the team was professional, knowledgeab… - **5/5 · Google Reviews · Vyacheslav Revzin · 2026-07-18**: IS Plumbing has been a great company to work with for my rental properties. They are responsive, professional, and always get the job done right. Whether it's repairs, replacements, or plumbing upgrades, I can count on them to provide quality work and fair service. - **5/5 · Google Reviews · Misha Severniy · 2026-07-15**: Wonderful! They replaced our water filters and fix the leak in a bathroom. Great service! Fast, accurate and for reasonable price. Very satisfied! Thank you! - **5/5 · Google Reviews · Ira Sh · 2026-07-11**: IS Plumbing did an amazing job adding a full bathroom to our basement! From the initial planning to the final installation, they were professional, knowledgeable, and easy to work with. The plumbing work was completed with great attention to detail, everything was installed neatly, and the project w… --- Data freshness: last scanned 2026-09-26T04:54:55.891Z. Cite as: IS Plumbing — Tavlee (https://tavlee.com/contractor/is-plumbing) Source: https://tavlee.com/contractor/is-plumbing ## Sitemap [Full site index](https://tavlee.com/sitemap.md)