Water Pressure Testing in North Bay
Water pressure testing in North Bay is a measurement service from Poly-B Plumbing for homes on municipal water and on wells in North Bay, Callander, Sturgeon Falls, Powassan and the surrounding communities. A pressure test is two readings on a calibrated gauge, static with nothing running and working with taps open, plus a check of the pressure reducing valve, expansion tank, shut-offs and any treatment equipment in the line. Normal is 50 to 70 psi; below 40 is a weak shower and above 80 is wear on every fixture and a voided warranty on the water heater. Poly-B reads it, explains it and fixes the cause. Call 705-345-6616.
Service hours
- Monday to Thursday7:00 am to 7:00 pm
- Friday7:00 am to 5:00 pm
- Saturday and SundayClosed
Emergency service is available during business hours only. Members of the $49-per-month plan get priority scheduling.
What the readings mean
| Reading | What it usually means | What Poly-B does |
|---|---|---|
| Static pressure under 40 psi, municipal | Failed or misadjusted pressure reducing valve, a partly closed main, or a corroded galvanized service | Adjust or replace the PRV; open or replace the valve; quote a new service line |
| Static pressure under 40 psi, well | Pressure switch set low, waterlogged tank, weak pump | Reset the switch, recharge or replace the tank, test the pump |
| Static pressure over 80 psi | No PRV, or one that has failed open; street pressure is high on some North Bay hills | Install or replace the PRV; add an expansion tank |
| Static fine, working pressure drops hard | Undersized or scaled supply pipe, clogged softener or filter, restricted service line | Bypass and test the treatment; camera or replace the pipe |
| Pressure creeps up when the water heater runs | Thermal expansion in a closed system with no expansion tank | Install or recharge the expansion tank; check the relief valve |
| Pressure swings every few seconds on a well | Bladder failed in the pressure tank | Replace the tank |
| Banging pipes when a tap or appliance shuts | Water hammer, usually high pressure plus no arrestors | Bring pressure into range; add hammer arrestors at the washer and dishwasher |
When to have pressure tested
- Weak showers, especially upstairs, or pressure that drops when a second fixture opens.
- Pipes knocking when the washer or dishwasher shuts off.
- A dripping relief valve on the water heater, or a new water heater whose warranty requires pressure under 80 psi.
- Fixture cartridges and toilet fill valves failing early; that is what high pressure does.
- Before and after a softener or filtration install, so a flow problem is not blamed on the new equipment.
- Buying a home; the reading is a cheap, objective line in an inspection.
- On a well, any change in how the pump cycles.
What the code says about pressure
The Ontario Building Code requires a pressure reducing valve where the supply pressure to a building exceeds 550 kPa, which is about 80 psi, and manufacturers of water heaters, fixtures and appliances set the same limit in their warranties. A pressure reducing valve is a spring-loaded device on the main after the meter; it wears, drifts and eventually fails open, and the first symptom is usually a dripping water heater relief valve or a run of early fixture failures. Where a PRV, a check valve or a backflow preventer closes the system, the code calls for an expansion tank so heated water has somewhere to go. Poly-B checks both on every test.
What pressure testing costs in North Bay
Poly-B Plumbing quotes pressure testing flat-rate, in writing. Most tests can be scheduled within two to three days and take under an hour. The test is included in the annual inspection and the membership, and it is done as part of any softener, filtration, water heater or well pump job. Booked on its own, the price depends on whether a treatment bypass test, a well system check or a camera inspection is added, and repairs found are quoted separately: a PRV, an expansion tank, a pressure switch or a tank replacement are all same-visit jobs when the part is on the truck.
Pressure in North Bay homes
North Bay’s municipal system serves a city built on a hillside between Lake Nipissing and the escarpment, and street pressure varies more than most people expect between the shore and the top of the hill; homes low on the system can see pressure well above 80 psi, and homes without a working PRV wear through fixtures on a schedule. On wells around Corbeil, Astorville, Bonfield and Powassan, pressure is whatever the switch and the tank deliver, and a waterlogged tank is the most common pressure complaint Poly-B sees. Older homes in either setting can hide galvanized supply pipe that has narrowed to a fraction of its bore, which no valve adjustment fixes. Plumber (306A) is a compulsory trade regulated by Skilled Trades Ontario; Poly-B’s owner is a Red Seal journeyman plumber licensed for plumbing, wells, septic and backflow prevention, with up to $5 million in liability insurance.
Sources: Ontario Building Code, Part 7 Plumbing; Skilled Trades Ontario, Plumber (306A).
How Poly-B tests pressure
Ask about symptoms
Which fixtures, what time of day, what changed, and a look at the plumbing layout.
Static and working readings
Calibrated gauge on a hose bib or laundry tap; static with nothing running, working with two taps open.
Component check
PRV, expansion tank, main and fixture shut-offs, softener and filters, well switch and tank.
Diagnose and plan
Results explained in plain terms, with the fix quoted in writing if one is needed.
What North Bay customers say
“Reliable.”Curtis Avery, Google review, May 2025
“Excellent professional job!”Debbie Moss, Google review, May 2025
Where Poly-B tests pressure
Water pressure questions from North Bay homeowners
What should normal water pressure be?
Between 50 and 70 psi. Below 40 psi showers are weak; above 80 psi fixtures wear early and water heater warranties are voided, and the Ontario Building Code calls for a pressure reducing valve.
Can Poly-B fix pressure problems, not just measure them?
Yes. Poly-B Plumbing installs and adjusts pressure reducing valves and expansion tanks, replaces seized shut-offs and waterlogged pressure tanks, resets well switches, and replaces undersized or scaled piping when that is the cause.
Can pressure change over time?
Yes. PRVs drift and fail, galvanized pipe narrows, well pumps weaken, tanks lose their charge, and thermal expansion pushes pressure up as a water heater runs. A yearly reading catches the change.
Will this help with noisy or banging pipes?
Usually. Water hammer is high pressure plus no arrestors, and once pressure is in range and arrestors are fitted at the washer and dishwasher the banging stops.
How is pressure tested on a well?
The same gauge readings, plus the pressure switch cut-in and cut-out, the tank’s air charge with the water drained, and how the pump cycles. A waterlogged tank is the most common finding.
Book water pressure testing in North Bay
Monday to Thursday 7 am to 7 pm, Friday 7 am to 5 pm. Most tests are scheduled within two to three days.
Call 705-345-6616 Request a free online quote
Poly-B Plumbing, 1107 Yellek Trail, North Bay, ON P1B 8G5.