The Quick Answer
A standard home inspection covers plumbing at a surface level — a generalist inspector tests fixtures, checks visible pipes, and looks for obvious leaks. What it doesn’t cover: the condition of the sewer lateral, the pipe material throughout the home, water heater age and condition, well pump status (for homes on private wells), or hard water damage to fixtures and appliances. In Michigan’s pre-1970 housing market, these omissions can represent $5,000–$30,000 in deferred maintenance that a buyer inherits. This guide tells you what a thorough pre-purchase plumbing assessment should cover and how to get one.
The Grand Rapids real estate market moves fast. In competitive conditions, buyers sometimes feel pressure to waive inspections or accept the standard home inspection as sufficient. For plumbing specifically, that’s a gamble worth understanding — because the most expensive plumbing problems in pre-1970 Michigan homes are the ones that aren’t visible during a walk-through.
This guide is for buyers, buyers’ agents, and anyone helping someone navigate a home purchase in West Michigan who wants to understand what a thorough plumbing assessment should cover.
What a Standard Home Inspection Covers (and Misses)
| What the Standard Inspection Covers | What It Misses |
|---|---|
| Visible pipe condition in accessible areas | Does NOT include pipe material identification throughout the home |
| Fixture operation (turn on, turn off) | Does NOT assess water pressure or flow rate adequately |
| Hot water availability at major fixtures | Does NOT assess water heater age, anode rod condition, or remaining life |
| Visible water stains or obvious leaks | Does NOT identify hidden leaks inside walls or below slabs |
| Drain function (runs freely) | Does NOT camera-inspect the sewer lateral |
| Sump pump activation (if accessible) | Does NOT load-test sump pump or assess discharge line condition |
| Water heater visible condition | Does NOT assess T&P valve function or sediment accumulation |
| Well presence noted (if on well) | Does NOT test well water quality or assess pump condition |
| A standard home inspection serves an important purpose — it’s a generalist assessment of a complex system. For plumbing specifically, it is a starting point, not a complete picture. A licensed plumber’s pre-purchase assessment complements the general inspection by going deeper on the items that cost the most when they fail. |
The Pre-Purchase Plumbing Checklist: What Kenowa Plumbing Assesses
🔩 Pipe Material Identification
Identifying the supply pipe material throughout the home is the single most important plumbing assessment step for any pre-1970 home in West Michigan. Galvanized steel supply pipes are a known and significant liability in this housing stock — once corrosion is advanced, the pipes need full replacement, not spot repair. Knowing the pipe material before purchase allows you to factor repiping costs into negotiation or set a realistic near-term budget.
What we look for:
- Supply pipe material in the basement and utility areas (galvanized, copper, PEX, CPVC)
- Condition of galvanized pipe if present — corrosion level, flow rate, pressure drop indicators
- Evidence of previous spot repairs (patches, couplings, mixed pipe types) that suggest a history of failures
- Drain pipe material (cast iron, ABS plastic, PVC) and condition of visible sections
📷 Sewer Lateral Camera Inspection
A sewer camera inspection — inserting a waterproof camera through the cleanout to view the line all the way to the municipal main — is the most cost-effective pre-purchase investment a buyer can make on a pre-1970 home. Sewer lateral replacement costs $4,000–$12,000 and is not covered by home warranties. Root intrusion, offset joints, collapsed sections, and deteriorated clay tile are common in Grand Rapids-area homes of this era and are completely invisible without a camera. Kenowa Plumbing performs pre-purchase sewer camera inspections as a standalone service — schedule it during the inspection contingency period.
🔥 Water Heater Age and Condition
Water heaters have a 10–12 year typical lifespan. The serial number on a water heater encodes the manufacture date — Kenowa Plumbing can decode this during inspection. A water heater that is 9–12 years old may be functional at closing but will likely need replacement within 1–3 years. Knowing this allows a buyer to either request a seller credit, negotiate it into the price, or simply budget for it. A water heater failure six months after closing — without forewarning — is a frustrating and avoidable experience.
📊 Water Pressure and Flow Rate
Kenowa Plumbing measures water pressure at the hose bib or a fixture using a pressure gauge during the inspection — a step most general inspectors skip. Normal residential pressure is 45–80 PSI. Pressure below 40 PSI may indicate a failing pressure regulator, a partially closed main shutoff, or — in galvanized pipe homes — severe internal scale restriction. Identifying this during inspection allows the buyer to understand what they’re purchasing rather than discovering it after move-in.
🧪 Lead and Water Quality Assessment
For homes built before 1960, Kenowa Plumbing recommends a water quality test as part of the pre-purchase assessment — specifically for lead, copper, bacteria, and hardness. We can pull a first-draw sample from a kitchen faucet that has sat stagnant overnight and have it tested by a certified Michigan laboratory. If the result shows elevated lead, the buyer can request seller disclosure of the service line material and investigate replacement program eligibility before closing.
💧 Sump Pump Condition (If Applicable)
Kenowa Plumbing activates the sump pump by pouring water into the pit during inspection, confirms the pump runs and removes water, checks the discharge line to the exterior, and assesses the age and condition of the unit. A sump pump that’s 8+ years old or that doesn’t activate during the test is a negotiating point — sump pump replacement costs $500–$900, and a flooded basement costs far more.
🌊 Well System Assessment (For Homes on Private Well)
For homes on private wells — common in rural and suburban areas of Kent, Ottawa and Allegan counties — a well system assessment is a critical addition to any pre-purchase inspection. This includes checking the pressure tank (waterlogged tanks are a common find), assessing pump age and cycle behavior, reviewing any available well completion records (depth, yield, casing condition), and arranging a water quality test. A well pump replacement is a $1,200–$6,000+ expense depending on well depth that is entirely unpredictable without pre-purchase investigation.
Red Flags: Plumbing Issues That Should Affect Your Offer
🚩 Deal-Altering Red Flags — Factor Into Negotiation or Walk Away
Galvanized supply pipe throughout the home in advanced corrosion stage (budget $5,000–$12,000 for repiping). Collapsed or severely root-intruded sewer lateral on camera inspection (budget $4,000–$12,000 for replacement). Lead service line confirmed by city records or visual inspection (budget $3,000–$8,000 for replacement, though city programs may assist). Active slab leak indicated by warm floors, sounds of running water with nothing on, or foundation moisture. Sump pump absent in a basement that shows prior flood staining.
💡 Negotiable Issues — Request Seller Credit or Price Adjustment
Water heater 9–12 years old (budget $1,000–$1,600 for replacement). Sump pump 8+ years old or showing age (budget $500–$900). Early-stage galvanized pipe with moderate restriction (monitor and plan for repiping within 5 years). Backflow preventer absent on irrigation system (budget $300–$600 for installation). Pressure regulator failing (budget $300–$500 for replacement).
✅ Minor Items — Disclose but Don’t Overweight
Running toilet (flapper repair, $75–$150). Slow drains at fixtures (snaking, $150–$250). Dripping faucets (washer replacement, $75–$150). Aerator scale buildup (part of normal maintenance in West Michigan hard water areas). Minor condensation on cold-water pipes in summer (normal, not a defect).
Timing: When to Schedule a Plumbing Inspection During a Purchase
In a typical Michigan home purchase, the inspection contingency period is your window for a pre-purchase plumbing assessment. Here’s how to use that window effectively:
- Days 1–2 of inspection period: Schedule both the standard home inspection and the Kenowa Plumbing specialist assessment for the same week. They can be on different days — the plumber doesn’t need to be present for the general inspection.
- Day 3–5: Receive results from both inspections. Review plumbing findings together.
- Day 5–7: If sewer camera or water quality testing was requested, results are typically available within 2–5 business days.
- Day 7–10: Use findings to negotiate — request seller credits, price adjustments, or repairs before closing. Or, if red-flag issues are severe, exercise the inspection contingency to withdraw.
| Kenowa Plumbing can typically schedule a pre-purchase inspection within 2–5 business days of your request. Contact us as soon as you’re under contract — don’t wait until the last day of your inspection contingency period to schedule. |
Frequently Asked Questions
For a recently built home with modern plumbing materials and no history of issues, a standard inspection is usually sufficient for plumbing. For any Michigan home built before 1970, or any home with a known history of plumbing issues, the standard inspection is a starting point — not a complete picture. The items that cost the most (sewer lateral condition, pipe material, water heater age) are the items most often inadequately covered by standard inspections.
A Kenowa Plumbing pre-purchase assessment — including pressure testing, visible pipe assessment, and water heater evaluation — typically costs $200–$400 depending on the scope and home size. Adding a sewer camera inspection is an additional $200–$450. For a home in the $200,000–$400,000 price range, this investment to identify potential $5,000–$15,000 issues represents exceptional value. We provide a written report you can use in purchase negotiations.
Yes — and ask for documentation of the work, permit records, and who performed it. ‘Recently updated’ is one of the most frequently misrepresented claims in real estate. Unpermitted plumbing work done by a non-licensed contractor may look fine visually but fail to meet code, be improperly installed, or create issues at resale. A licensed plumber can assess whether the claimed updates are accurately represented.
Absolutely — this is one of the primary purposes of the inspection contingency. Kenowa Plumbing provides a written assessment report that documents findings with supporting observations. Your buyer’s agent can use this documentation to request seller credits, price adjustments, or pre-closing repairs. We have helped many Grand Rapids buyers save thousands of dollars in post-closing surprises through pre-purchase assessment.
