Plumbing & Drainage
Plan straight sleeve stock for repeated pipe penetrations through walls, floors or similar assemblies after the required sleeve size and detail have already been selected. Count penetrations, enter the average cut length and convert the total into sold stock pieces.
Change the defaults to match your project and the product you plan to buy.
Project result
Review measured cut length, allowance-adjusted target, whole stock pieces and optional material cost.
At a glance
Planning estimate only. Verify product coverage, package size, supplier specifications and project requirements before purchasing.
Budget scenario
Use a current supplier subtotal or reuse a priced calculator result, then add optional delivery, tax and contingency. Home Measure Lab does not fetch or guess live prices.
Enter a current supplier subtotal or reuse a priced calculator result.
Budget values are local planning inputs, not live quotes. Verify tax treatment, delivery, labor and supplier pricing before purchasing.
Methodology
penetration count × average cut length
Use groups when assembly thicknesses differ.
base length × (1 + cut allowance)
Keeps offcut reserve visible.
target ÷ sold stock length, rounded up
Final rounding occurs at the supplier unit.
whole pieces × sold stock length
Shows stock surplus separately from required cut length.
Count only penetrations that use the same sleeve material and approximate cut length. Measure the assembly thickness plus any required extension already specified by the penetration detail. Separate thick foundation walls, thin partitions and floor slabs into different groups when their sleeve lengths differ significantly; averaging unrelated assemblies can hide a large stock error.
The calculator only determines straight sleeve stock quantity. Sleeve diameter, material, fire-resistance detail, waterproofing, sealing, structural restrictions and annular-space requirements must come from the actual project or approved system. Check whether offcuts can be reused before selecting the cut allowance and use the real sold stock length for purchase rounding.
Reference
| Layer | Record | Keep external |
|---|---|---|
| Count | penetrations using same sleeve type | Do not mix incompatible details. |
| Cut length | assembly thickness + specified extension | Required penetration detail. |
| Allowance | offcut/cut reserve | Separate from measured length. |
| Stock conversion | actual sold length | Round only at purchase boundary. |
Questions
No. Diameter and annular-space requirements come from the actual penetration detail.
Only when they use the same product and similar cut lengths. Otherwise calculate groups separately.
No. Firestopping and sealing systems are separate project materials and requirements.
Planning guides
Plumbing & Drainage
Count compatible penetrations and measure sleeve cut lengths by assembly before converting the total to whole stock pieces.
Read guide →Estimate pipe-hanger or support count from developed horizontal run, repeated runs and a project-specified maximum support spacing.
Open calculator → Plumbing & DrainageConvert measured drain runs into an allowance-adjusted pipe length and whole stock-section count for material planning.
Open calculator → Plumbing & DrainageCalculate approximate internal pipe volume from inside diameter and length, with output in gallons/liters and cubic volume.
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