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Mainline PlumbingPlumber in Londonderry, NH

Mainline Plumbing is a plumber at 71 Mammoth Rd, Londonderry, NH 03053, ranked #1 of 398 plumbers in Londonderry and rated 5.0 from 565 Google reviews. Open Monday to Saturday.

Londonderry, NHUpdated 0 paid placements in any rankingHow we rank

Call (603) 472-5261Website ↗

Key facts

Key facts about Mainline Plumbing
Address71 Mammoth Rd, Londonderry, NH 03053Get directions
Phone(603) 472-5261
Websitecallmainline.com
HoursMonday to Friday: 6 AM – 6:30 PM; Saturday: 6 AM – 2 PM
Google rating5.0 from 565 Google reviews

Trades

Each trade shows the evidence we matched it on.

Service area

Serves Londonderry and 11 towns within 25 miles: Windham, Derry, Derry Village, Hudson, Litchfield, Pelham, Nashua, Merrimack, Salem, Hampstead and Chester.

Based in Londonderry, NHView on map

Opening hours

Opening hours for Mainline Plumbing
DayHours
Monday6 AM – 6:30 PMevening
Tuesday6 AM – 6:30 PMevening
Wednesday6 AM – 6:30 PMevening
Thursday6 AM – 6:30 PMevening
Friday6 AM – 6:30 PMevening
Saturday6 AM – 2 PM
SundayClosed
  • Open evenings (after 6 PM)
  • Open Saturdays
  • Open Sundays — no

Typical plumbing prices

Typical plumbing prices
JobLowTypicalHigh
Water heater replacementPer unit, installed (unit plus labor); typical range of customer-reported jobs. US national range$882$1,348$1,826

Market ranges for the trade, checked October 2026, not a quote from this business. Ask for a written estimate.

Compare nearby plumbers

Mainline Plumbing compared with nearby businesses
BusinessRankCR ScoreGoogle ratingLicense verifiedSaturdaySundayDistance away
Mainline Plumbing (this business)—625.0 (565)—YesNo
Flow Pro Plumbing and Drain Cleaning#2615.0 (118)—YesYes7.7 mi
Priority Plumbing#3614.9 (149)—YesYes6.9 mi

See all 398 ranked plumbers in Londonderry

Reviews

ContractorsRanked reviews

No ContractorsRanked reviews yet

Google

5.0from 565 Google reviews

Hired Mainline Plumbing? Write a review

Questions about Mainline Plumbing

How is Mainline Plumbing ranked in Londonderry?

Mainline Plumbing is ranked #1 of 398 plumbers in Londonderry by CR Score, with 62 out of 100 as of October 2026. The score weighs reputation, credentials, review volume, recency, availability, trade focus, proximity, claimed profile, partnered and ContractorsRanked reviews. No business can pay to change its rank.

What are Mainline Plumbing’s hours?

Mainline Plumbing is open Monday to Saturday. Its listed hours are Monday to Friday, 6 AM – 6:30 PM; Saturday, 6 AM – 2 PM. On Saturdays it is open 6 AM to 2 PM and closed on Sundays. Hours come from the business listing; holiday hours may differ.

What areas does Mainline Plumbing serve?

Serves Londonderry and 11 towns within 25 miles: Windham, Derry, Derry Village, Hudson, Litchfield, Pelham, Nashua, Merrimack, Salem, Hampstead and Chester. The list is based on the business's location and the usual service radius for plumbing. Confirm your address is covered when you call.

What do Google reviews say about Mainline Plumbing?

Mainline Plumbing has a rating of 5.0 from 565 Google reviews. The CR Score adjusts the star rating for review count, so a high rating from a few reviews counts for less than the same rating from many.

How do I contact Mainline Plumbing?

Call Mainline Plumbing on (603) 472-5261. The business is at 71 Mammoth Rd, Londonderry, NH 03053. Its website is linked in the key facts on this page. Ask for a written estimate before any work starts.

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