How much extra pipe should I buy?

Ten percent is a practical allowance for miscuts and small layout changes on a straightforward run.

How many joints does one can of solvent cement cover?

An 8 oz can typically makes about 40 small-diameter joints. Larger pipe diameters use more cement per joint.

Most manufacturers and codes require primer before solvent cement on PVC. Follow the cement label and local code.

No. Each fitting is counted as one purchased piece, and its joints are added to the cement and primer estimate.

Free download: the one-page TrueMeasure project cheat sheet — coverage rules and material math.

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