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Manassas, VA

Plumbing & HVAC in Manassas

Forty-eight percent of the roughly 14,505 homes in the City of Manassas went up in the 1980s and 1990s. That is the polybutylene window, and it is the most useful thing to know before anyone touches your plumbing.

Polybutylene went in from 1978 until about 1995. Grey plastic, crimped at the fittings, often stamped PB2110. It does not fail the way copper fails. Copper gives you a pinhole, a stain on a joist, and a year to think it over. Polybutylene lets go all at once, on a Saturday, with nobody home. Find it and we would rather plan a repipe than let the pipe pick the date.

Another 14% of the city went up in the 1960s and 14% in the 1970s. Different list entirely. Cast iron stacks scaling shut from the inside, water service lines at the end of a long run, and Orangeburg laterals in anything built before about 1972. Sewer work on those blocks starts with a camera.

City Water, And It Is Softer Than Anything Around It

Manassas runs its own water utility and its own treatment plant in Nokesville, permitted at 14 million gallons a day, drawing from Lake Manassas on Broad Run. Not Prince William Water. Not Fairfax Water. The City's own 2025 sampling puts hardness at 47.00 ppm as calcium carbonate, which is 47 mg/L, soft to moderately soft. Fairfax Water publishes 84 to 170 mg/L system-wide. That figure belongs to the city system only, and plenty of Prince William addresses post as Manassas.

So, an opinion in writing. Inside the city we think a water softener is money you do not need to spend. Soft water also changes what to expect from a water heater, because scale is what shortens tank life in hard water towns and it is not what ends tanks here. A Manassas tank that dies at six years died of something else. And if anyone quotes you a hardness in grains per gallon, ask where it came from: the City publishes none, so every gpg figure for this city is somebody's conversion.

The Lead Inventory Came Back Clean

On 16 October 2024 the City submitted its lead service line inventory. It identified the City-owned and customer-owned portions of over 13,000 service lines, and found no lead and no galvanized requiring replacement. Manassas has been on reduced lead monitoring since 2012, and the City's mains are not lead. We do not get to write that about many places we work. It also means discoloured water here points away from the buried line, so check the heater and the interior piping instead.

What The City Publishes About Permits, And What It Does Not

Manassas publishes less than its neighbours and some of it is old. The cross-connection document still cites the 2000 plumbing code. Inspection guidance dates from 2020. Better said plainly than papered over.

  • Water service line, $75.00 flat. One fee covers new, replacement and repair, revised 24 June 2024. Unusually simple for this area.
  • Sewer laterals have no published fee line. A permit is still required: Virginia code 13VAC5-63-80 Section 108.1, before work on the sanitary drainage system. That section also lets an emergency replacement be permitted retroactively by the end of the first working day after work starts, which is the clause that matters when a lateral gives up on a Sunday.
  • Water heaters are unresolved. The schedule carries a $75.00 line for 'Hot Water Heater/Water Softener'. The City separately publishes an exemption for replacing plumbing fixtures without altering the supply, drainage or vent systems. Both are published, neither overrides the other in print, and we will not invent the answer. For a like-for-like swap, call the Building Official on 703-257-8278.

Manassas Asks More Of A Backflow Tester Than Its Neighbours

Testing rules in the city are stricter than anywhere adjacent. A tester needs the Virginia DPOR Backflow Prevention Device Worker certificate, and that alone is not enough: the City requires separate registration and issues its own Backflow Worker card. Neither Fairfax City nor Falls Church asks for one. Testing is annual at minimum, plus after any install, replacement or repair, on a five-year overhaul cycle by device type. That document dates from 2016, so confirm the current rule with the City. Then ask whoever you call, us included, whether they hold the Manassas card. Backflow work is our trade; that card is a separate question, and the honest answer is to ask.

Common Questions

Is the water hard in Manassas?
No, and this is the one place locally where that is true. The City's own 2025 sampling reports 47.00 ppm as calcium carbonate, which is 47 mg/L, soft to moderately soft. Fairfax Water publishes 84 to 170 mg/L system-wide for comparison. The City publishes no grains per gallon figure, so any gpg number you see for Manassas is a conversion somebody did rather than a City figure.
Do I need a water softener in Manassas?
Inside the city, our answer is no. At 47 mg/L there is not enough hardness to justify the equipment, the salt or the servicing. On well water or in harder areas the maths changes, and we will tell you when it does.
Who supplies water and sewer in the City of Manassas?
The City does, which makes it unusual in our coverage area. Manassas owns its water utility and treats its own water at a plant in Nokesville from Lake Manassas, with supplemental water purchased through Prince William Water at peak. The City owns the sewer collection system; treatment is by the Upper Occoquan Service Authority.
Does my Manassas house have polybutylene?
No address tells you that. What we know is that 48% of homes here went up in the 1980s and 1990s, and polybutylene was installed from 1978 to about 1995. It is grey, often stamped PB2110, and most visible at the water heater, the main shutoff and where pipe enters a wall. Find it and plan the repipe on your schedule instead of its own.
Do I need a permit to replace a water heater in Manassas?
Call the Building Official on 703-257-8278, and that is not us dodging the question. The City's fee schedule carries a $75.00 line for a hot water heater or water softener. The City also publishes an exemption for replacing plumbing fixtures where the supply, drainage and vent systems are not altered. Both are published, so for a straight swap the only reliable answer comes from the office that issues the permit.
Is there lead in Manassas water service lines?
The City submitted its lead service line inventory on 16 October 2024, identifying the City-owned and customer-owned portions of over 13,000 service lines, and found no lead and no galvanized requiring replacement. Manassas has been on reduced lead monitoring since 2012 and its water mains are not lead. Plumbing on your side of the meter is not part of that inventory, so older fixtures and solder are still worth a look.
Do I need a permit for a sewer lateral in Manassas?
Yes, even though the City's fee schedule has no sewer lateral line item, which is why we will not quote you a permit figure for one. Virginia code 13VAC5-63-80 Section 108.1 requires a permit before work on the sanitary drainage system. For a genuine emergency the same section allows it to be permitted retroactively by the end of the first working day after work begins.
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