Quick Answer: A standard blow-out clears your lateral lines and heads. On a well-fed irrigation system it does not touch the pump housing, the pressure tank feed, or the supply piping between the well and the valve manifold — all of which hold water and all of which crack. Well systems need those components drained or isolated separately, every fall. 609-548-5187.
Why Wells Are a Different Job
On municipal supply, the boundary is simple: you close the main, and everything downstream of it is your problem. Every part of that is reachable by compressed air through the blow-out port.
A well system does not work that way. There is no municipal shutoff — the well is the supply, and between the pump and your first zone valve sits a chain of components that hold water and are not in the blow-out path:
- The pump housing itself
- The pressure tank and its feed line
- Supply piping from the well head to the manifold
- A sediment or iron filter, if fitted
- Check valves and foot valves
- Any above-ground pressure switch assembly
Blow out the zones and walk away, and you have protected the cheap half of the system while leaving the expensive half full of water.
Where Well Systems Actually Crack
Above-ground pump housings
Jet pumps and above-ground booster pumps in an unheated shed, garage or pump house are the most common casualty. The housing holds water, the housing is exposed, the housing cracks. A cracked pump body is a replacement, not a repair.
Exposed supply piping
The run from the well head to the manifold is frequently shallower than the irrigation laterals — sometimes barely buried, sometimes partly above grade through a crawlspace or along a foundation. Shallow means less thermal protection.
Pressure tanks
Tanks in unheated spaces hold a substantial volume of water. Freeze damage to a tank bladder is not always obvious until the system behaves strangely in spring.
Sediment and iron filters
Common on NJ wells because of iron content. The filter housing holds water, is usually plastic, and splits readily.
Extra Steps for a Well System
- Cut power to the pump at the breaker before anything else. A pump that kicks on mid-winterization is a bad afternoon.
- Drain the pump housing via its drain plug, and leave the plug out for the season.
- Drain the pressure tank completely.
- Clear the supply line between well head and manifold with air, or drain it where the grade allows.
- Open and drain the filter housing, and pull the cartridge.
- Blow out the zones normally — 50 PSI on poly, 80 PSI on PVC, 2–3 full passes.
- Drain the backflow preventer and open test cocks to 45 degrees.
- Insulate anything left exposed — pump, exposed piping, above-ground fittings.
- Leave the controller off and the pump breaker off through winter.
Iron and Sand: A Fall Job Worth Doing
NJ well water often carries iron and fine sand, and the fall visit is the natural moment to deal with the accumulation. Iron builds up in nozzles and reduces throw; sand scores valve seats and causes weeping. If you have been getting orange staining on siding or walkways, flag it when you book — head nozzle cleaning or replacement is far easier while the system is being shut down than during the spring rush.
More on the tradeoffs: well water vs. city water for irrigation.
Where This Matters Most
Private wells are common across Lacey Township, Lanoka Harbor, Forked River, Waretown, Barnegat and the rural Ocean County townships; throughout Colts Neck, Holmdel, Millstone and Wall in Monmouth County; and across the Pinelands communities in Ocean and Atlantic County. If you are not certain whether your irrigation runs off the well or the house supply, we will confirm it when we come out.
Booking
Well systems take longer, so we schedule them earlier in the October 15 – November 15 window. Tell us it is a well system when you book. See the 2026 winterization schedule.
Related
Licensed & insured — NJ LIC#719827 · LICBP-726164. Call or text 609-548-5187.