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Determine the right pipe diameter for your plumbing
Water rates in Rhode Island average $6.00 per 1,000 gallons. Freeze protection is important in your climate.
Climate Zone
5
Electricity
$0.22/kWh
Labor Costs
115% avg
Determine the right pipe diameter for your plumbing project
Rhode Island is in Climate Zone 5 - Cool-Humid/Cold (significant heating, moderate cooling). Homes here typically have higher heating demands than cooling.
Proper pipe sizing considers several factors:
Typically 3/4" for the main branch to the bathroom, with 1/2" lines to individual fixtures. If the run is long or you have low pressure, the main branch might need to be 1".
High pressure helps, but you still need adequate volume. A small pipe with high pressure delivers water fast but not much of it. Size for flow, not just pressure.
Most homes have 3/4" or 1" main supply lines from the meter. Branches to individual fixtures are typically 1/2". Older homes sometimes have undersized 1/2" mains.
Slightly. PEX has smooth interior and maintains flow well. Galvanized steel corrodes internally over time, reducing effective diameter. Copper is in between. For new installations, the differences are minor.
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