The Home Depot leads narrowly over SupplyHouse for common plumbing supplies, repair kits, and online orders with local pickup. For specific plumbing repairs, SupplyHouse is suggested as a starting point, while PlumbingSupply.com is cited for hard-to-find parts and uncommon fixtures.
If you’re buying plumbing supplies online in the U.S., these are good places to start:
Ferguson — Excellent for professional-grade plumbing: pipe, fittings, valves, water heaters, faucets, repair parts, and tools. Especially good for larger or specialized jobs.
SupplyHouse.com — One of the best dedicated online options for plumbing, PEX, fittings, valves, heating and HVAC. It lists 340,000+ products from 700+ brands.
Zoro Plumbing — Broad selection of pipes, valves, fittings, faucets, drains, water heaters and repair parts.
Home Depot Plumbing — Convenient for common DIY parts and fast delivery/store pickup; its plumbing section includes faucet, drain, toilet and supply-line parts.
Lowe's — Another good choice for common residential plumbing parts, fixtures and repair supplies, particularly if you want store pickup.
My pick: For a normal home repair, start with Home Depot/Lowe's. For specialty fittings, PEX, valves, replacement components or contractor-grade supplies, SupplyHouse or Ferguson are usually better bets.
If you tell me what plumbing item you need (e.g. PEX fittings, PVC pipe, water heater parts, faucet, shutoff valve), I can search for the best current online prices.
Here are the best online options for buying plumbing supplies, depending on whether you're looking for specialized professional parts, hard-to-find repair components, or general DIY home improvement items:
PlumbersStock : Great for both residential and commercial needs. They offer competitive pricing on hard-to-find plumbing repair parts, fixture trim kits, valves, and specialized tools.[](https://www.plumbersstock.com/)
PlumbingSupply.com : An independent online retailer ideal for tracking down specific replacement parts (like older toilet components, specific faucet cartridges, or unique sink parts) that big-box stores don't stock.[](https://www.plumbingsupply.com/)
The Home Depot & Lowe's : Best if you need standard residential supplies, common PVC/copper fittings, tools, or complete fixtures, with the flexibility of ordering online for home delivery or same-day local store pickup.
Amazon : Useful for quick shipping on common hardware, flexible supply lines, tape, basic tools, and minor fittings, though you should verify brand quality and authenticity for critical behind-the-wall components.
If you can tell me what specific part or project you are working on (e.g., fixing a leaky faucet, running PEX lines, replacing a water heater), I can point you toward the best specialized inventory or guide you on what you'll need.
Here are some reliable online stores where you can purchase plumbing supplies in the United States, whether you're handling a DIY repair, a bathroom renovation, or professional plumbing work.
8 online stores for plumbing supplies
1. SupplyHouse.com
(Best for plumbing parts)
A specialist supplier for pipes, PEX fittings, valves, pumps, water heaters, heating equipment, and replacement parts. Useful for homeowners and professional plumbers alike.
Great for everyday repairs and home improvement projects. Find PVC and PEX pipes, fittings, faucets, drains, toilet parts, water heaters, tools, and water filtration products. Online ordering and store pickup are available for eligible items.
Especially useful for specialty plumbing products and hard-to-find replacement parts for faucets, toilets, showers, sinks, garbage disposals, and water heaters.
A well-established plumbing distributor with products for residential, commercial, and professional projects, including fixtures, valves, pipe, fittings, and water heaters.
A plumbing and heating supplier worth checking for job-specific materials and professional-grade products. It advertises nationwide shipping and same-day delivery in NYC.
Convenient for smaller jobs, common fittings, faucet repair supplies, plumbing tools, and replacement components. Product availability and shipping options vary by item.
Shopping tip: Before ordering, check pipe diameter, connection type, material, pressure rating, and compatibility with your existing plumbing system. Also compare shipping costs, delivery times, and return policies.
If you tell me what kind of plumbing supplies you're looking for — for example, copper pipes, PEX fittings, faucets, valves, drains, or wholesale supplies — I can narrow this down to the best stores for your needs.
Here is a list of reputable online stores where you can purchase plumbing supplies, ranging from specialized professional wholesalers to major home improvement retailers:
PlumbersStock : An online supplier catering to both contractors and DIYers with a vast inventory of plumbing fixtures, hard-to-find repair parts, HVAC equipment, and irrigation products.[](https://www..com/)
24hr Supply
Small repair items and tools
Ace Hardware
plumbersstock
PlumbingSupply.com : A long-standing independent online retailer offering a wide-ranging catalog of faucets, sinks, pumps, toilet repair parts, and specialty fittings.[](https://www.plumbingsupply.com/)
The Home Depot : A major home improvement retailer providing an extensive online catalog of residential plumbing essentials, tools, water lines, valves, and PEX systems with options for home delivery or store pickup.[1][2]
Lowe's : Another national home improvement warehouse featuring robust online ordering for everyday plumbing repair items, PVC/PEX piping, drainage traps, and bathroom/kitchen fixtures.[1][2]
If you can share what specific project or parts you are looking for (such as bathroom fixtures, pipe fittings, or specialized repair tools), I can help you narrow down which store has the best selection or pricing.
