Easy water supply/flush connection
- Thread starter brenkco
- Start date
Correct.........and the same issue exists if you use a 2-way hose splitter right at the connection into RV park hose bib.....just look inside the splitter and you can see the inside diameter reduction of the valve used. It really doesn't matter to most, but I was drinking at the campfire one night and thought.......what if I could take a shower at the same time the wife decides to do the dishes?I understand. I think he recognized that he would loose flow if he used a single splitter and that was why he used the quad splitter with the washer hose. But I could be wrong. What say you Mr. RockDr896?
BryanValRox
Elite Member
You had me at drinking around the campfire!!!!!!!!!!!
Midnight Rider
Prominent Member
The Sea Monster! 🦑🦑🦑🦑
Creek Jenkins
Well-known member
A 3/8” diameter tube has almost exactly one fourth of the area of a 3/4” diameter tube, so by using two 3/8” diameter valves you still have only half the area of your original 3/4” tubing. It is better than one valve but it is not equal to the original diameter.
Also, flow through a tube does not have higher velocity in the center. With all of the fittings, diameter changes, tubing bends, these manifold set ups will always have turbulent flow, in other words, widely varying velocities across the internal area of the tube. Turbulent flow causes a pressure drop, pressure drop decreases flow. If you have a very long straight tube, you can achieve laminar flow, which would mean uniform velocity all across the area of the tube and low pressure drop.
At the relatively low tube velocity through these waterlines, turbulent v laminar flow isn’t contributing much to the pressure drop. Diameter changes are the biggest factor I would wager.
Cheers
Creek
Also, flow through a tube does not have higher velocity in the center. With all of the fittings, diameter changes, tubing bends, these manifold set ups will always have turbulent flow, in other words, widely varying velocities across the internal area of the tube. Turbulent flow causes a pressure drop, pressure drop decreases flow. If you have a very long straight tube, you can achieve laminar flow, which would mean uniform velocity all across the area of the tube and low pressure drop.
At the relatively low tube velocity through these waterlines, turbulent v laminar flow isn’t contributing much to the pressure drop. Diameter changes are the biggest factor I would wager.
Cheers
Creek
Flyer32RLS
Well-known member
Same method just different material. Found that those plastic start leaking after a short time. switched to brass connections.
Flyer32RLS
Well-known member
Ah HA!! Now we get to the truth! He was drinking by the campfire!! Explains it all!! Great things come to a relax mind.....even tho no one else can understand it. It made sense to you so that is all that matters!! Camp on!!
Happy Glamping!!
Flyer32RLS
Well-known member
Light weight!! Jack's a mans drink!! LOL
Flyer32RLS
Well-known member
Wow! This subject has gotten to a point it hurts my head. I'll just leave my single connection as is and be happy!!
Meaning, wife can take a shower while I'm out by the campfire having a tody!!
Happy Glamping everyone and its getting to be that season very soon!!😂
Meaning, wife can take a shower while I'm out by the campfire having a tody!!
Happy Glamping everyone and its getting to be that season very soon!!😂
George
Well-known member
Been using some of them 15+ years and no leaks on any. The plastic does suffer some UV damage if left in the sun for a few years though.
I just like the water shut-off feature. Do any of the brass ones shut off like an air compressor hose does when disconnected? Brass WOULD be better.
Flyer32RLS
Well-known member
Geroge,
If you were referring to the splitter valve, yes, they do have them in brass, (see link). They also splitters that have more than just 2 as you will see when you look at the link. Not sure what the description means by 3.38 pounds per second. Coule they mean gal? That pretty good water flow!
BryanValRox
Elite Member
So, is it the topic that has your head hurting, or is it the drinking around the campfire?🤣
Jwtsg
Well-known member
Added 03/13/2026: Simple,,,,That's what we use- 1 domestic H20 hose w 2 way splitter = 1-1’ SS hose to city water,,,&1-1’ SS hose to the black flush connection. Dump each tank separately,,,black flush seperately,,,,,,,splitter inside heated pass thru,,,has worked for us for a long time.
George
Well-known member
My bad, I was talking about the Melnor Quick Disconnects. Definitely use brass splitters. I noticed there are several "Full Flow" splitters on Amazon that do not restrict much at all.
Update 3/14: LOL Full flow is exactly what your link is.
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Midnight Rider
Prominent Member
🦑🦑🦑🦑🦑🦑🦑🦑
Flyer32RLS
Well-known member
BryanValRox, I'm not sure which yet, can't remember the topic and what camp fire? 🤪