---
title: "Plumbing & Water"
url: https://bkgreenstone.com/topics/plumbing-and-water/
description: "Knowing what you can isolate, and what changes when you reduce flow at the fixture rather than at the main."
---

# Plumbing & Water

## All topics

- IN[Insulation & Air Sealing](https://bkgreenstone.com/topics/insulation-and-air-sealing/)
- WD[Windows & Doors](https://bkgreenstone.com/topics/windows-and-doors/)
- HV[Heating & Ventilation](https://bkgreenstone.com/topics/heating-and-ventilation/)
- PW[Plumbing & Water](https://bkgreenstone.com/topics/plumbing-and-water/)
  - [Reading a shutoff valve layout](https://bkgreenstone.com/articles/reading-a-shutoff-valve-layout/)
  - [Low-flow fixtures and water pressure](https://bkgreenstone.com/articles/low-flow-fixtures-and-water-pressure/)
- ME[Masonry & Exterior](https://bkgreenstone.com/topics/masonry-and-exterior/)
- MF[Millwork & Finishes](https://bkgreenstone.com/topics/millwork-and-finishes/)

## Reference sheets

- [Nominal lumber sizes](https://bkgreenstone.com/reference/nominal-lumber-sizes/)
- [Fastener and pilot sizes](https://bkgreenstone.com/reference/fastener-and-pilot-sizes/)
- [Insulation material guide](https://bkgreenstone.com/reference/insulation-material-guide/)

Knowing what you can isolate, and what changes when you reduce flow at the fixture rather than at the main.

Three levels of isolation: the main stop, a floor isolator where one exists, and the fixture stop under each outlet.

## Notes filed under this topic

- [Reading a shutoff valve layout](https://bkgreenstone.com/articles/reading-a-shutoff-valve-layout/) last worked on 2015-05-14
- [Low-flow fixtures and water pressure](https://bkgreenstone.com/articles/low-flow-fixtures-and-water-pressure/) last worked on 2015-03-30

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