dowop
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Hi,
I'm new to this site and have searched and read past articles on water pipe sizing - go easy on me. I'm in the process of performing extensive remodeling on a small 3 bedroom 1 bath single story house (1100 Sq. Feet) and have a question regarding water pipe sizing. Home is built on a slab and currently all the piping exposed. I have a 3/4" copper main coming in to the house. Immediately after the shut-off it splits off w/ 1/2" copper to two branches.
On one branch I have a Tub, Lavatory Sink, Water Closet and the branch terminates at an instant hot-water heater. (7.8 Fixture Units)
On the other branch I have a Kitchen Sink, Hosebib, Dishwasher, and Washer Machine. (9.5 Fixture Units)
The 1/2" copper hot water supply leaves the Hot Water Heater and goes to each unit in sequential order (no branching).
If this is confusing, please see my cryptic picture below:
O = 3/4" Supply
O---Sink (1.5)---Bib (2.5)---DW(1.5)---Washer (4.0)
|
|
Tub(4.0)
|
Lav (1.0)
|
WC (2.5)
|
|
Hot Water Heater
My thinking is as follows:
I should be OK with a 1/2" hot supply throughout the house. Yes/no?
A 1/2" cold supply to the branch that contains the bathroom and Hot Water Heater as it stands now should be OK.
My concern and question is regarding the other branch. The kitchen/Laundry room branch looks to me like it should be 3/4" up to the dishwasher and then safe to reduce to 1/2" to feed the laundry area. So in this case I would have only a small section of 1/2" to replace with 3/4".
Since everything is exposed, I sure would like to make it right before I button up the walls. If anyone has any suggestions/recommendations I would appreciate them.
Thanks in advance! (sorry for the long message)
joe
I'm new to this site and have searched and read past articles on water pipe sizing - go easy on me. I'm in the process of performing extensive remodeling on a small 3 bedroom 1 bath single story house (1100 Sq. Feet) and have a question regarding water pipe sizing. Home is built on a slab and currently all the piping exposed. I have a 3/4" copper main coming in to the house. Immediately after the shut-off it splits off w/ 1/2" copper to two branches.
On one branch I have a Tub, Lavatory Sink, Water Closet and the branch terminates at an instant hot-water heater. (7.8 Fixture Units)
On the other branch I have a Kitchen Sink, Hosebib, Dishwasher, and Washer Machine. (9.5 Fixture Units)
The 1/2" copper hot water supply leaves the Hot Water Heater and goes to each unit in sequential order (no branching).
If this is confusing, please see my cryptic picture below:
O = 3/4" Supply
O---Sink (1.5)---Bib (2.5)---DW(1.5)---Washer (4.0)
|
|
Tub(4.0)
|
Lav (1.0)
|
WC (2.5)
|
|
Hot Water Heater
My thinking is as follows:
I should be OK with a 1/2" hot supply throughout the house. Yes/no?
A 1/2" cold supply to the branch that contains the bathroom and Hot Water Heater as it stands now should be OK.
My concern and question is regarding the other branch. The kitchen/Laundry room branch looks to me like it should be 3/4" up to the dishwasher and then safe to reduce to 1/2" to feed the laundry area. So in this case I would have only a small section of 1/2" to replace with 3/4".
Since everything is exposed, I sure would like to make it right before I button up the walls. If anyone has any suggestions/recommendations I would appreciate them.
Thanks in advance! (sorry for the long message)
joe
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