How to completely suck out the hoses on a pump off???

Take it down to the ports in Camden, nj you can get anything sucked dry there

 

Need more info, what kind of pump, what diameter hose, how far are you pumping, are you trying to pump vertical, does customer have a check valve in the line? Every pump job is different, and increases the injury/spill potential tenfold at least. I have been pumping everything from water to Ortho (before it was illegal).

 

Once your compartment is empty.. I do these steps.
1. While pumps still on, remove house just a smidge from the load head to see if any is running out. If not I proceed to step 2. If it is.. I put hose back on and let it drain.. Closing and opening the compartment a few times gets I dry.

2. Close compartment and while pump is still on.. Remove hose, cap and then walk the length of the hose, holding it over my head. Once or twice usually does the trick... If not..

Step 3. Drain hose in drain bucket and then empty bucket at yard or terminal if allowed.

 

Also, make sure your just turning the pump off and not accidentally moving in a bit to the reverse or blow off position. That'll pump a bit back in of your not careful.

 

The bleeder valve is for your protection to air off the leftover pressure of the hose. If I have a bleeder valve on my connection , then I will use it. Now usually once my compartments empty out I let ..... oh I'm sorry I'm thinking about airing off and not pumping. But I've done this too . I use to let it go but if you're going into an above ground tank, are you closing the end hose valve first or your compartments?

 

Well what dark said is the proper technique.

 

What worked for me since 1978 and still does as of last Friday is, after I see I'm done pumping (note; I put a clear view site glass on the discharge side of my pump plumbing with a 1/4 turn wet/dry valve too, but not everybody has that luxury,) I first walk the length of the discharge hose from the discharge valve/outlet on trailer a couple times and get the liquid to go to the pump. THEN, I close the discharge valve that the hose is connected to...and I open ONE of the Evertite ears, allowing it to suck air. You won't get anything to happen at all if you don't do that (or have a bleeder as mentioned,) because it's like putting your thumb over a straw with liquid in it...you have to walk the hose again and maybe twice, to ensure you got it all back to the pump, then walk the outlet side hose to the receiving tank inlet you're pumping into to get that empty too.

Keep in mind, if the pump you are using is getting weak, things don't go quite as well as this. Mine's a year old and still strong, so when I'm done walking my hoses, I shut the valves all off, get the pump shut down ASAP (that prolongs the life of the pump/PTO, shaft {if you have one} too, shutting it down as soon as you can,) and that's it.

It never hurts to have a container readily available to catch your drips under the pump and trailer connections either; keeps you looking and feeling warm and fuzzy with the customers. I solved 99.9% of that dripping at my pump fittings with that 1/4 turn valve, but not everybody wants to spend the $100.00 for one. Keep a low profile bucket handy if you need the clearance.

Sounds to me like you're closing all your valves with the pump engaged, and then when you shut it down and go to disconnect you've got residual pressure. That's where the "cracking of the ear" on the inlet side of your suction line comes in...Gotta relieve that before you try to disconnect.

Another little scientific tidbit about capping hoses you'll notice after this, is when the ambient temperature changes. If you cap/plug a hose in the morning when it's cool, and the temperature climbs during the next load...beware of that excessive pressure inside the hose. I use it as a sideshow now, after getting punched in the face a few times with a speeding 3 or 4" plug because I was too dumb to face it away from my head. I hold the hose vertical, snap the ears open and sometimes I can get that sucker to fly 10 feet in the air, and catch it while people are watching and make myself look a LOT smarter than I really am. But that came after a few black eyes.

Opposite happens when it cools down...a vacuum is created inside the hose, and you need to hook a chain and a bulldozer to the plug to get it out sometimes. I manage to release the vacuum by rocking the plug side to side in the fitting, then it's all good.

Hope it all helps out. Not rocket science, just experience, and it's also some interesting physics lessons. Sheldon Cooper wouldn't have a thing on me.