Pick home-run or trunk-and-branch, count fixtures, set run distance WSFU, main size, coils, and fittings update live.
Fixture takeoff
Total 19.2 WSFU → 1" main supply · 22 manifold ports
½″ PEX coils to order
9
COILS
Bill of materials+0% waste
½″ PEX blue (cold)
448 ft · 100-ft coils
Net 13 connections · Waste +15%
½″ PEX red (hot)
311 ft · 100-ft coils
Net 9 connections · Waste +15%
Main supply 1" PEX
> 14 WSFU → 1″ main (simplified IPC-based rule confirm with developed length + pressure per IPC E103.3)
Net 19.2 WSFU · Waste —
Brass fittings & crimp rings
10-pack fittings
Net 22 connections · Waste —
Manifold ports
Dedicated home-run ports
Net 13 cold + 9 hot · Waste —
Cost projection
Saved on this device · No account · No cloud
Total · $528.50
9 coils 1" main
IPC water supply fixture units: full bath 3.5, half bath 1.5, kitchen 2.0, laundry 2.0, hose bibb 2.5. At or under 14 WSFU a ¾-in main suffices; above that, step up to 1-in.
Pick home-run or trunk-and-branch, count fixtures, set run distance WSFU, main size, coils, and fittings update live.
½-in PEX footage = connections × average run × 1.15 slack toilets and hose bibbs pull cold only, dishwashers hot only.
Home-run systems get dedicated manifold ports per connection; trunk-and-branch doubles the main trunk allowance.
WSFU sum → ¾″ or 1″ main
Size the main from total water supply fixture units (WSFU): at or under 14 WSFU a ¾-in main suffices; above that, step up to 1-in. The tool totals your fixtures and recommends the main size automatically.
2 full baths (7.0) + 1 half bath (1.5) + kitchen (2.0) + laundry (2.0) + 2 hose bibbs (5.0) = 17.5 WSFU — over 14, so run a 1-in main supply.
Count hot and cold connections per fixture, multiply by the average run from the manifold, and add 15% for snaking and slack — a typical 2-bath home-run needs about nine hundred-foot coils.
Home run gives each fixture a dedicated ½-in line back to a central manifold (best pressure, more tubing); trunk and branch runs a ¾-in main through the house with short ½-in branches (less tubing, more fittings). The tool prices out both with manifold ports and fitting packs.
Per IPC water supply fixture units: a full bath is 3.5, a half bath 1.5, a kitchen 2.0, laundry 2.0, and each hose bibb 2.5. Verify fixture-unit values against the plumbing code your AHJ enforces.
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