The Roof Cleaning Institute Of America Training & Certification Forum
"Find A Certified Roof Cleaner Directory"

Members Login
Username 
 
Password 
    Remember Me  
Our Founders Website -> Locate A Certified Roof Cleaner | Roof Cleaning Institute Of America -> Certified Roof Cleaning - Equipment -> 5/8 polybraid hose with 3/4 fittings less flow restriction?
Post Info TOPIC: 5/8 polybraid hose with 3/4 fittings less flow restriction?
Maverick Contracting


Premium Member Roof Cleaning Institute of America

Status: Offline
Posts: 399
Date:
5/8 polybraid hose with 3/4 fittings less flow restriction?
Permalink  
 

Just wondering if fitting 3/4 quick connects with 5/8 polybraid hose would be beneficial by reducing flow restriction?

5/8" in/dia polybraid hose fitted with 5/8" hose barbs that measured 1/2" in/dia. I figure must reduce the flow rate at least some.

If I heat the end of the polybraid and force it over a "3/4" ext/dia. barb which should have an inner diameter around 5/8" there would be no flow restriction till the sauce gets to your whatever sized tip you are using.

Is the bigger quick connects worth it? confuse



__________________

Maverick Contracting

Long Island, N.Y.
JHWorth


Guest

Status: Offline
Posts: 155
Date:
Permalink  
 

Is your wand popping off while it sits idle?? I just put new poly hoses on my trailers and I took them right back, they were some chinese made soft polybraid. I did not like how it rolled up on the reels and the barb would pop out if it sat for a few minutes. I found the good stuff through Amazon hose, shoud have done that in the first place. Same price too.

__________________

ORLANDO / CENTRAL FLORIDA "SAFE NO PRESSURE ROOF CLEANING" AND PRESSURE WASHING Since 1998.

407-415-3419Systems/142182342502994

WWW.TROPICALROOFANDEXTERIOR.COM

http://www.facebook.com/#!/pages/Tropical-Roof-and-Exterior-Cleaning-
JHWorth


Guest

Status: Offline
Posts: 155
Date:
Permalink  
 

And it shouldn't restrict the flow.

__________________

ORLANDO / CENTRAL FLORIDA "SAFE NO PRESSURE ROOF CLEANING" AND PRESSURE WASHING Since 1998.

407-415-3419Systems/142182342502994

WWW.TROPICALROOFANDEXTERIOR.COM

http://www.facebook.com/#!/pages/Tropical-Roof-and-Exterior-Cleaning-
Pressure Washer Products


Guest

Status: Offline
Posts: 639
Date:
fittings
Permalink  
 

Great question! 

We do not really prefer the thin wall of the clear braid poly hose.  It has a tendency to kink unless you go with a more expensive grade of clear braid like the food grade.  Look for a greater bend radius or stiffer hose.

It is easy to stretch out the hose and take the 5/8" id down to 1/2" id in the heat.  It is easy to slice or catch.  Step up to an chemical hose or ag hose.  However, 5/8" yellow ag is difficult to use during the first month or two.

NEVER use the clear braid poly hose on the suction side of the pump.  It will collapse under suction and is very soft in the heat and is not good practice when plumbing pumps.

You have a creative approach to using the hose barbs and heat.  However, I feel that the heat may weaken that area of the hose and may set you up for a potential love spill.  We do NOT recommend using polypropylene or nylon hose barbs due the inablilty of the soft composition of the material to handle stress such as pulling or tugging or lots of vibration.  Use Sch 80 PVC hose barbs or brass.  Stainless in 316 is nice but PRICEY.

There is a big difference in flow through between the 1/2" and 3/4" fittings.  I usually step up in most instances.  I uploaded a few pics showing the difference between 1/2" and 3/4" as well as the difference in material.

I would recommend staying away from couplers and plugs in brass or stainless at the pump or middle of the hose or at the ball valve.  They will leak if they are not used at a high enough pressure.  Instead, go with poly camlocks.



__________________

 

Pressure Washer Products, 800-519-9279, 727-424-6600, roof cleaning systems, roof cleaning chemicals, air diaphragm pumps

Pressure Washer Products.com

(800) 519-9279

(727) 562-5488 Outside USA

sales@pressurewasherproducts.com

DISTRIBUTORS OF SOFT WASH EQUIPMENT, SOFT WASH CHEMICAL,  

PRESSURE WASHERS & HIGH PRESSURE ACCESSORIES

 ONLY Call/Email Lori for Set-Up Help
Maverick Contracting


Premium Member Roof Cleaning Institute of America

Status: Offline
Posts: 399
Date:
5/8 polybraid hose with 3/4 fittings less flow restriction?
Permalink  
 

I think I'm gonna answer my own question here:

"Venturi effect" from what I remember is when a larger mass of any fluid, gass or liquid is constricted by a narrower passage the  velocity increases meaning it flows faster and then when returns to an equal diameter on the other side its velocity slows down as it needs to fill the larger volume (diameter) on the other side (5/8" hose in this case)

Think of it this way, 5 lanes of traffic doing 10mph need to go thru 1 lane so everyone speeds up to 50mph the on the other side expands out to all 5 lanes again...  to stay the same distance apart (a liquid at the same temp would have molecules at the same "distance" from each other) the cars on the other side would reduce speed back domn to 10 mph.

I know Too much thinkin on my partno

but if it was a bottle of beer when the "cars" came out of one lane and kept expanding into 5 lanes at 50mph it'd be shakin up a warm can and handin it to a friend!  Thats what happens at your nozzle tip.  So while fluid travelin 100ft thru your hose doesnt travel 100ft leaving the tip, the constriction after your tip is far less than in the hose.

I think too much on my days off cry

------------------------------------

BTW Lori, I'm thinkin of this cause I'm gettin ready to purchase either Banjo poly camlocks or Kuriyama also sells poly camlocks.  Shoot me a price for my 5/8" hose.  I looked up prices a few weeks back before I got busy again.

-------------------------------------

just looked up a better explanation:

"...The next principles to consider are the Conservation of Mass and Venturi Effect. These principles are quite hard to explain (for me at least!) but can be demonstrated using the venturi tube below.

VenturiTube

As the air passes through the tube it meets a narrow throat through which it must pass. The amount of air that enters through the inlet must be the same as the amount that exits at the end, so to pass through the throat the airflow must accelerate, and by increasing in velocity it reduces in pressure. Once through the throat the diffuser increases the diameter of the tube back to that of the inlet, and therefore slows the airflow back to its original velocity."

source:

http://refraction.co.uk/blog/2009/05/03/so-what-is-a-diffuser-and-what-does-it-do-for-an-f1-car/



-- Edited by Maverick Contracting on Tuesday 16th of August 2011 06:35:08 PM

__________________

Maverick Contracting

Long Island, N.Y.
Page 1 of 1  sorted by
 
Quick Reply

Please log in to post quick replies.
Our Founders Website -> Locate A Certified Roof Cleaner | Roof Cleaning Institute Of America -> Certified Roof Cleaning - Equipment -> 5/8 polybraid hose with 3/4 fittings less flow restriction?
Tweet this page Post to Digg Post to Del.icio.us


Create your own FREE Forum
Report Abuse 		Powered by ActiveBoard