Q:
# What is the pipe-fitting formula for a 45-degree offset?

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### Quick Answer

**The pipe-fitting formula for a 45-degree offset in plumbing is the length of a diagonal connector, known as the travel, times 0.707.** To calculate rolling offset, when a pipe changes direction both vertically and horizontally, it is necessary to find the values for true offset, the setback and the diagonal.

True offset is found by squaring the offset and adding the square of the rise value to equal the true offset squared. The square root is then found to determine true offset. With true offset determined, a pre-existing table can be used to find setback and diagonal values.

Plumbing often involves working on pipes hidden behind walls, in small utility rooms or in other tight spaces. Plumbers often work without direct access to pipes, for instance when working with underground sewer lines. In some cases, cameras are sent in to assess problems, and then plumbers use pumps lowered with cables to execute pipe replacements.

Understanding some math, especially geometry, is necessary for plumbers who must calculate exact angles for pipes and their fittings. The Pythagorean theorem is used in plumbing to find the value for true offset. The theorem holds that in a right triangle, the square of the side opposite the right angle equals the sum of the squares of the other two sides.

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Q:
## What is a plumbing riser?

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Full Answer >**A riser is a supply line, usually made of metal or plastic that is intended to connect a faucet or shower fixture to the stop valve of the water supply.**Plumbing risers are commonly made of copper. Metal flex risers, however, are actually corrugated, which allows them to be bendable.Filed Under: -
Q:
## What is a pipe spool?

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Full Answer >**Pipe spools are sections of pipe that have been put together with fittings off-site to meet the needs of a construction project, according to the International Journal of Architecture, Engineering and Construction.**Pipe spools increase the speed of construction.Filed Under: -
Q:
## Where can you find reviews of plumbing companies?

A:Customer reviews for plumbing companies are available at websites that allow customers to write reviews of businesses they have used, such as Yelp. Yelp allows customers to rate a business on a five-star scale and write a small review of the company.

Full Answer >Filed Under: -
Q:
## What is a cross connection in plumbing?

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Full Answer >**In plumbing, a cross connection is one where the city's water supply pipe comes into contact with a source that could contaminate the water.**Backflow from the cross connection is what contaminates the water.Filed Under: