Most of Olney is on WSSC Water for water and sewer, though some outlying properties sit outside the public sewer envelope and run private onsite wastewater systems. WSSC also issues plumbing and gas permits and requires yearly testing of backflow assemblies. Call the number on this page to be connected with a local plumber in Olney.

Olney conditions for commercial plumbing
Olney was mostly farmland until the 1960s and is now a largely residential suburb built around the crossroads of Georgia Avenue (MD 97) and Olney-Laytonsville Road (MD 108). Its commercial side is a town-center mix of shops, restaurants, offices, a theater and community facilities such as the Olney Swim Center. The median home dates to 1986.
WSSC Water's Patuxent reservoirs, Triadelphia and T. Howard Duckett, border northern Olney. WSSC water here may come from its Patuxent plant or its Potomac plant; its tap analysis puts average hardness around 64 mg/L for Patuxent water and around 140 mg/L for Potomac water. The county's master plan notes that public water was extended to Mt. Zion to relieve well problems and that some outlying properties can't be served by gravity sewer, so a business on the edge of town may not match its neighbors.
Repair now or plan a replacement?
| Item | Repair often makes sense when | Replacement is worth pricing when |
|---|---|---|
| Commercial water heater | A thermostat, element or valve has failed on a newer unit | The tank leaks or demand has outgrown it |
| Flush valves | Internal parts are worn | Bodies are corroded or parts are hard to find |
| Backflow assembly | A check or relief valve fails its test | The device is damaged or no longer suits the hazard |
| Building drain | A blockage clears and the camera shows sound pipe | The line is cracked, sagging or root-filled |
Warning signs
- Toilets that run or restrooms that smell of sewer gas
- A kitchen line that slows a little more each week
- Higher water use with no change in operations
- Rust-colored water from a water heater drain
- A slow drain or wet ground near a private onsite system on an outlying property
Seasonal timing
WSSC wants lawn irrigation assemblies tested every year, with the report made at spring start-up, so schedule before the busy season. Plumbing and gasfitting permits go through WSSC Permit Services (301-206-4003). For a main break or sewer overflow, WSSC's emergency service center is 301-206-4002. If gas is suspected, leave the building, then call 911 and your gas utility from outside; the utility's name is on the gas bill.
Commercial Plumbing questions in Olney
What if a business property is not on public water or public sewer?
What should staff do if they smell gas in the building?
Where does the water line become the property owner's responsibility?
What details help a plumber before a commercial service call?
More plumbing services in Olney
Commercial Plumbing nearby
Helpful guides
Sources
- Olney Master Plan (Montgomery Planning, PDF)
- WSSC Water: Tap water analysis, Potomac and Patuxent plants (PDF)
- WSSC Water: Backflow prevention and cross-connection control
- WSSC Water: Permit information for homeowners
- WSSC Water: Water quality
- WSSC Water: What's Your Pipe Type? FAQs
- Olney housing by year built (city-stats.com)
- Olney, Maryland (Wikipedia)
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