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

Feb 3, 2011

These will pump just fine through 1/2" ID hose.
I was thinking of trying to see if one of my my 5 gpm Delavan pumps could be adjusted to run through the 1/2" hose as a backup? { One quick try so far and it was cycling on and off-shuddering etc }
Before I go through all the trouble of trying, I thought I would see what you all have to say about that.
Thanks,
Chuck

Roof Cleaning Memphis TN (901) 826-8370 · Guest

thats not good for me. i just bought a 5850 and 200 ft of 1/2" hose. well, maybe i wont tear up anything. makes me SHUDDER to think about it.

OSM-Jo · guest

There are guys using 1/2" hose with the 5850's. And there are some additional equipment that will help with the cycling of the pumps too. Check out the bypass setup, the accumulator by Flowjet or just use a regulator. all these will work but they all have pros and cons. Most setups are personal preference or just what you can afford.

Guest

Chuck,
If you use #30 tips or larger, you should be fine with 1/2" hose. If you want to be sure, just put the tips on you are planning on using and spray into a bucket and see how ofter the pump cycles on and off. 3GPM shouldn't be affected by 1/2" diameter hose. The tips will have more influence.

Brian

Confident Roof Cleaning Houston TX · Guest

I use 7gpm through 1/2" just fine

Matthew · Guest

If the pumps continues to cycle on/off it "could" overheat.

Installing a simple bypass valve on the pump may be the easist fix for a "quick change" situation.

RCIA Founder

Rodney wrote:

thats not good for me. i just bought a 5850 and 200 ft of 1/2" hose. well, maybe i wont tear up anything. makes me SHUDDER to think about it.

The nozzle will be more important then hose size, as far as the pump cycling. Smaller hose like 1/2 inch reduces flow and pressure compared to larger hose, but everything is a compromise, and 1/2 will be just fine, with slightly reduced performance vs larger hose size.

Feb 4, 2011

Matthew wrote:

If the pumps continues to cycle on/off it "could" overheat.

Installing a simple bypass valve on the pump may be the easist fix for a "quick change" situation.

Hello Matthew, can you explain how I can install this bypass valve?
Please explain exactly how I put this together, if you don't mind?
After 22 years of no pressure roof cleaning, you'd think I'd know something about everything, but I don't, I guess?
Thank You!
Chuck

Guest

I mentioned a by-pass valve along time ago to prevent the pump from cycling and the switch from burning up,...and the response was if the pump runs continually,...the pump itself may overheat.

Jeff

Matthew · Guest

Raystown Roof Cleaning Central PA 1-800-236-0322 wrote:

I mentioned a by-pass valve along time ago to prevent the pump from cycling and the switch from burning up,...and the response was if the pump runs continually,...the pump itself may overheat.

Jeff

I haven't found that to be the case.

But then I don't have a 20 ft of small wire and 12v switches between the battery and the pump either. Nor do I keep it in a small black box, which is what I think hurts them more than running.

I have run my pump non stop for 4-5 hours regurlarly and it never gets to hot to hold on too, so... I dunno.

All I can say is that from my experience... cycling pumps don't last as long as ones that run all the time.

Whether it's in bypass or you're using a 30 or 40 tip what is the difference? Running is running, right?

I don't sit around on the roof and let it run for hours without cleaning... So I'm a bit confused why people say what they say...

Any way...

@ Chuck:

I'll get a photo up here soon for ya buddy!

SP Cleaning · Feb 4, 2011

I use 200' of 1/2" Kuri Tec Ag hose
running through a Delavan 5850
with 40 tips, and have no cycling
problems.

Chris

Matthew · Guest

You shouldn't

But cut the nozzle size in half or less and you will.

For anyone walking a roof or doing tile roofs especially, a #40 tip is way overkill.
Heck, their are days I'm using #5 tips on tile roofs.

Okay @ Chuck:

A pressure relief valve like this one is hooked up on the out/down side of the pump.
It goes from the pump through the valve then onto the reel. The third (smaller) opening is for the relief hose that runs back to the mix tank.

When pressure builds up in the line it opens the valve and relieves the pressure into the tank causing the pump to run recirculating the tank until you open the ball valve on the roof and relieve the pressure which closes this valve and sends the love back onto the roof.

I'll get you a real life pic if you need it.

Feb 4, 2011

Matthew wrote:
You shouldn't

But cut the nozzle size in half or less and you will.

For anyone walking a roof or doing tile roofs especially, a #40 tip is way overkill.
Heck, their are days I'm using #5 tips on tile roofs.

Okay @ Chuck:

A pressure relief valve like this one is hooked up on the out/down side of the pump.
It goes from the pump through the valve then onto the reel. The third (smaller) opening is for the relief hose that runs back to the mix tank.

When pressure builds up in the line it opens the valve and relieves the pressure into the tank causing the pump to run recirculating the tank until you open the ball valve on the roof and relieve the pressure which closes this valve and sends the love back onto the roof.

I'll get you a real life pic if you need it.

Hi Matthew, ya, I must be gettin' dull minded in my old age. If you could put up a real life picture, that may help?

Guest

Matthew wrote:

Raystown Roof Cleaning Central PA 1-800-236-0322 wrote:

I mentioned a by-pass valve along time ago to prevent the pump from cycling and the switch from burning up,...and the response was if the pump runs continually,...the pump itself may overheat.

Jeff

I haven't found that to be the case.

But then I don't have a 20 ft of small wire and 12v switches between the battery and the pump either. Nor do I keep it in a small black box, which is what I think hurts them more than running.

I have run my pump non stop for 4-5 hours regurlarly and it never gets to hot to hold on too, so... I dunno.

All I can say is that from my experience... cycling pumps don't last as long as ones that run all the time.

Whether it's in bypass or you're using a 30 or 40 tip what is the difference? Running is running, right?

I don't sit around on the roof and let it run for hours without cleaning... So I'm a bit confused why people say what they say...

Any way...

@ Chuck:

I'll get a photo up here soon for ya buddy!

Yea Matthew I agree 100%,..which is why I mentioned it originally. I don't use 12V,..so I couldn't put up any personal experience to back it up.

Jeff

andy hinson · Feb 5, 2011

!2 v are great for pumping chems from barrels on to your trailer

Matthew · Guest

okay Chuck...

Won't happen today but I'll try to get one up before Monday.

Feb 5, 2011

RE: Thanks, I wonder why my name on here doesn't show "Certified" on it? I was among the 1st to be certified?

Matthew · Guest

RE: I use 1/2" ID chemical hose / 2gpm pumps-Any way to use my 5gpm thru 1/2" hose?

Feb 5, 2011

I appreciate that!

However, I really would like to have the fact that I am RCIA certified under my name, as the other certified roof cleaners have. Is it because I was among the first few here to become certified, way back in the beginning? Or do I need to do something to my ad to accomplish that? Or does a moderator or someone do it for me?
I often send my customers here, telling them that I am certified by RCIA and when they see my name, I think they should see it say "Certified Roof Cleaner"
Thank You! biggrin

Chuck

Roof Cleaning Cleveland (216) 323-0552 · Feb 5, 2011

Chuck, The certifications , I believe, are for premium members.

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

Hello, I went from 1.8 gpm Surefo pumps years ago, to 5 gpm Delavans. Now I have gone back down to 2 gpm Delavans and a tandem setup of two 2gpm Delavans, which ends up at aprox 3gpm in reality. { I tested it and calibrated it's output carefully.}

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