Eaton Family Plumbers
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We have one contractor in Diamond Bar on file, and it is on this list, along with 23 from towns including Rancho Cucamonga (3, 17 mi), Glendora (2, 10 mi) and Upland (2, 12 mi).
15 open 24/7 · 22 open weekends · all 24 rated 4.5+ · 15 show a license
Data verified October 15, 2026
The 24 companies listed for Diamond Bar, CA clear blocked drains and sewer lines. Hours, jetting and camera work, and free estimate claims come from each company's own website. Ask who carries their own jetter rather than subcontracting it before you book.

The 24 contractors on this page are rated from 4.5 to 5.0 across 11,888 reviews; 21 have 50 or more reviews. When customers rate these contractors on specific qualities, they most often praise professionalism (84%), responsiveness (82%) and quality (76%). The topics that come up most in reviews of the contractors on this page are "price", "communication" and "estimates". 15 are open around the clock; 22 are open on Saturdays and 17 on Sundays. The services the contractors on this page list most often on their websites are water heaters (6), leak detection (4), drain cleaning (3), plumbing repair (3) and sewer line repair (3). 15 show a license on their websites; 1 lists staff certifications (NATE) and 9 have a BBB rating of A or A+. Domain records put 15 websites of the contractors on this page at ten or more years old; the oldest dates from 1998. 15 offer emergency call-outs; 12 offer financing or payment plans; 9 give free estimates; 15 are family- or locally-owned and 15 list coupons or special offers. We count these figures across the contractors on this page; distances are straight-line, and hours and prices change, so confirm the details with the contractor before you book.
A website is linked by 23 of the 24 listings for Diamond Bar. Look for two things: whether they own a jetter and a camera or hire them in, and whether they show repair work as well as cleaning. A company that only cables will keep coming back for the same line.