How To Look At A House

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site-built, mobile/manufactured and modular homes

Can water pipe be run across the ground in a crawl space?

Friday, August 11, 2023

No. Plumbing codes require that water supply pipes be protected from damage and secured in place at regular intervals. The maximum spacing of securing devices is specified by code based on the size and type of pipe. This means that the pipe must either be secured to a stable surface of the crawl space or buried underground. Water pipe that runs on the surface of the ground is not acceptable because it is exposed to damage from anyone moving around in the crawl space.

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Field Guide for Home Inspectors, a quick reference for finding the age of 154 brands of HVAC systems, water heaters, and electrical panels, plus 210 code standards for site-built and manufactured homes, and the life expectancy rating of 195 home components. Available at for $19.95.
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Here’s links to some of our other blog posts about WATER PIPES:

Can galvanized steel pipe still be used for new water lines in a house?  

What is a galvanized nipple?

What are the pipes sticking out near my water valves?

Can PEX pipe be installed outside?  

 Is PEX pipe freeze resistant?

How do you accurately find a broken water pipe leak under the floor slab?

What is the difference between water pipe and sewage (waste) pipe? 

What is the average life expectancy of PEX pipe? 

What type of water supply and drain (DWV) pipes were commonly used in older houses? 

• What type of water supply and drain (DWV) pipes are commonly used today?

What is the average life expectancy of galvanized steel pipe? 

 Are plastic pipes (PVC, CPVC, and PEX) safe for drinking water? 

What do the ABS, PVC, CPVC, PB, and PEX plumbing pipe names mean?

Why is sunlight exposure bad for PVC pipe?

What is the average life expectancy of PVC pipe? 

Why can't PVC be used for water pipe inside a house?

What is the average life expectancy of copper pipe? 

How can I tell what type of plumbing pipe I have?

What is the difference between water service pipe and water supply pipe? 

Why is old galvanized steel water pipe a problem for homebuyers?

What does polybutylene pipe look like? Why is it a problem? 

• Which water pipes are an insurance problem and possibly uninsurable?

• Can PVC pipe be used for indoor plumbing? 

• Should I buy a house with galvanized steel water pipes?

• Can you connect CPVC pipe directly to a gas water heater?   

• Should I use a dielectric union or brass nipple to connect copper tubing and galvanized steel pipe?

• What problems are caused by connecting copper pipe/tubing directly to galvanized steel pipe? 

• Does code require water pipes in the attic to be insulated? 

• Does code require water pipes in a crawl space to be insulated? 

• When did they stop using copper pipe in houses? 

• Do you have to disclose polybutylene pipes to a homebuyer? 

• Does increasing water pipe size increase water pressure? 

• How far away do plumbing pipes have to be from an electrical panel? 

• Can PEX pipe be connected to a water heater? 

• Is an escutcheon plate required by code for safety? 

• Can I get insurance with PEX piping? 

• What is the difference between PVC water pipe and PVC electrical conduit? 

• What is the difference between PVC and CPVC pipe? 

• Can you bend CPVC pipe?


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