Question for any plumbers here

[Raider Ronnie]

Most towns plumbing drain pitch code is 1/4 inch per foot, or 1 inch for every 4 feet.
What does that equate to in degrees ?
I'm not necessarily looking for plumbing code but trying to figure out inch pitch per 4 ft = degrees.
Thanks

[Bill L]

I'm not a plumber but it should be 1.193 degrees
Posted from my iPhone/Mobile device

[ProfessorM]

did you forget your trig classes in school

[Raider Ronnie]

Originally Posted by Bill L

I'm not a plumber but it should be 1.193 degrees
Posted from my iPhone/Mobile device

How did you come up with that ?
What's the formula ?
Thanks.
Posted from my iPhone/Mobile device

[Raider Ronnie]

Originally Posted by ProfessorM

did you forget your trig classes in school

I've been out of school 30 years
Posted from my iPhone/Mobile device

[PRBuzz]

Originally Posted by ProfessorM

did you forget your trig classes in school

You mean the angle of the dangle?

sines, cosines, hypotenuse, left leg, right leg, must add to 180d, etc.

[striperman36]

Calculate Angle and Sides opposite, hypotenuse, adjacent of right angled triangle calculator

[5/0]

The angle will increase with the length of the run.
Whatcha working on?

[Saltheart]

In a triangle the 1 inch would be the opposite side and the 4 feet (48 inches) would be the adjacent side so you would use a tangent function (opposite/adjacent). Bill L's 1.193 is corect to 3 places.

BTW , why does the angle have meaning to you?

[Raider Ronnie]

Originally Posted by Saltheart

In a triangle the 1 inch would be the opposite side and the 4 feet (48 inches) would be the adjacent side so you would use a tangent function (opposite/adjacent). Bill L's 1.193 is corect to 3 places.

BTW , why does the angle have meaning to you?

Getting ready to rip up the deck in my boat because the scuppers & deck are too low. (wet deck)
15 ft span I have 4 inches drop for pitch so water runs to stern.
Going to raise deck and loose a bit of the pitch
Trying to determine how many degrees I have now and how many I want as it sits in the water now.
Want to raise scuppers 5 inches
Tired of a wet deck and having to wear boots everyday !
Posted from my iPhone/Mobile device

[Saltheart]

You are better off using rise and run. Raising the pitch from 1 in 48 to 2 in 48 (twice the pitch) just changes the angle by about a degree. I doubt you can measure an angle difference that low accurately but you can certainly tell the difference between 1 inch in 48 and 2 inches in 48.

In plumbing the pitch has to be controlled so you know what size pipe for what length of run to prevent siphoning the traps. On your boat I think you can do whatever you want within reason.