Frequently Asked Questions

Straight answers to the questions Central Jersey homeowners ask us most — the same way we'd answer them at your kitchen table.

Pricing, Scheduling & Emergencies

How do you price your work?

Every job is different, so we don't quote repairs sight-unseen over the phone. We evaluate the problem first, then give you a same-day estimate with the price explained before any work begins — no upsells, no surprises, and the decision is always yours.

Do you charge for estimates?

We offer same-day estimates for quick decisions. Call (908) 346-7473, tell us what's going on, and we'll explain exactly what an evaluation involves — including any cost — before we schedule, so there are no surprises.

Do you offer emergency service?

Yes. Grok Services offers emergency services 24 hours a day for the problems that can't wait — burst pipes, major leaks, sewer backups, no heat, and no hot water. Call (908) 346-7473 and talk to a local company that's been answering that call since 1969.

Do you guarantee your work?

Yes. All of our work is backed by our satisfaction guarantee. If something we installed or repaired isn't right, we come back and make it right — it's how we've done business since 1969.

Are you licensed and insured?

Yes — fully licensed and insured in New Jersey. Our master plumber license is NJMPL#11068 and our HVAC license is #19HC00371600.

What areas do you serve?

We're based at 559 NJ-28 in Bridgewater and serve Somerset County, Hunterdon County, and Middlesex County, NJ — including Somerville, Raritan, Basking Ridge, Warren, Hillsborough, and Flemington. If you're in Central Jersey, chances are we cover you — call (908) 346-7473 to confirm.

Plumbing & Drains

What's the difference between drain cleaning and hydro jetting?

Drain cleaning with a cable machine bores through a blockage and opens a path for water — the right tool for a single, simple clog. Hydro jetting uses high-pressure water to scour the full inside of the pipe, removing the grease, scale, and residue coating the walls, so lines stay clear far longer. If a drain keeps clogging after it's been snaked, jetting is usually the answer.

Why is my water bill suddenly so high?

A bill that jumps without a change in your water use usually means a hidden leak: a running toilet, a leaking supply line, or a break you can't see. We track down leaks in supply and drain lines — including hard-to-find ones — and repair them before they turn into water damage. More on our plumbing page, and in our article Why Is My Water Bill So High?

How long does a water heater last?

Most tank water heaters last about 8 to 12 years in Central Jersey's water conditions. If yours is in that range and needs repeat repairs — or you see rust or water pooling at the base — replacement usually makes more sense than another repair. Annual flushing and inspection extend a heater's life.

Heating & Cooling

What's the difference between a boiler and a furnace — and which do I have?

A furnace heats air and blows it through ductwork and vents. A boiler heats water (or makes steam) that circulates through radiators, baseboard, or radiant floors. If your home has radiators or baseboard and no vents blowing warm air, you have a boiler. Grok services both.

Should I repair or replace my heating system?

Age, repair history, and efficiency decide it. A sound system with a single failed part is usually worth repairing; a system that is 15–20 years old (furnace) or 25+ (boiler), needing repeat repairs, or driving fuel bills up every season is usually a replacement candidate. We'll give you the honest numbers both ways — repair cost versus replacement savings — and let you decide.

How often should I have my heating and cooling systems tuned up?

Twice a year: a spring tune-up for your air conditioning and a pre-winter visit for your heating system. Tune-ups catch worn parts before they fail at the worst moment, keep efficiency up, and extend equipment life. Boilers should be serviced annually.

Still have a question we didn't cover? Call (908) 346-7473 or send us a message — a real person from a local company answers.