# another plumbing question **URL:** \ **Category:** Factual Questions\ **Created:** [May 18, 2002, 5:40pm UTC](https://boards.straightdope.com/t/another-plumbing-question/109715 "2002-05-18T17:40:14Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![kanicbird](https://avatars.discourse-cdn.com/v4/letter/k/5f8ce5/32.png) [@kanicbird](https://boards.straightdope.com/u/kanicbird)\ **Post date:** [May 18, 2002, 5:40pm UTC](https://boards.straightdope.com/t/another-plumbing-question/109715/1 "2002-05-18T17:40:14Z")
As some of you figured out, I am doing some remodeling and trying to do as much as I can myself. I have questions about running water lines: 1 Do I have to run the hot and cold water lines to the sink together or can I get the cold water from the main line (very close to where the sink is going) and run a hot water line from the hot water heater by itself. I know there is no real reason that I can’t do it this way but I don’t recalling seeing a hot water line run by itself and was wondering if there is anything against the code in doing it this way. 2 I am also making a extra line for a hose on the other side of the house. This run will be going through an unheated crawlspace for about 50ft. Can I set up a drain valve at the lowest point to drain the water in the winter (or a valve at the highest point to allow air in to get the water to drain out? Any special valve needed to do this? 3 Hi Opal ---
**Author:** ![Lure](https://avatars.discourse-cdn.com/v4/letter/l/ba8739/32.png) [@Lure](https://boards.straightdope.com/u/Lure)\ **Post date:** [May 18, 2002, 7:49pm UTC](https://boards.straightdope.com/t/another-plumbing-question/109715/2 "2002-05-18T19:49:38Z")
Go to the alt.home repair newsgroup.Lots of informative posters/tradesmen there. ---
**Author:** ![ScoobyTX](https://avatars.discourse-cdn.com/v4/letter/s/ec9cab/32.png) [@ScoobyTX](https://boards.straightdope.com/u/ScoobyTX)\ **Post date:** [May 18, 2002, 8:09pm UTC](https://boards.straightdope.com/t/another-plumbing-question/109715/3 "2002-05-18T20:09:39Z")
1. There is no need to run a matched pair of lines. Get the HW and CW from the sources most convenient to install and using the least amount of materials. 2. To do this, install a shutoff valve where the hose bibb line branches off, and slope towards the hose bibb at 1/8" per foot or more. ---
**Author:** ![Billy\_Rubin](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/billy_rubin/32/3622_2.png) [@Billy\_Rubin](https://boards.straightdope.com/u/Billy_Rubin)\ **Post date:** [May 18, 2002, 8:18pm UTC](https://boards.straightdope.com/t/another-plumbing-question/109715/4 "2002-05-18T20:18:36Z")
Make sure you use a frostproof bib- also known as a sillcock. They are about a foot long and the valve portion is completely inside the house; this prevents freezing pretty well, as long as you remember to take the hose off and open the valve before winter. Good luck! b.