I have tried traditional Higginson Pumps for several years and been frustrated in that once you squeeze them (at least every one I've ever bought) the water can flow back up into the bag itself which requires you to clamp it off above the pump to get it to shoot properly out the hose (and into your favorite person).
I've found an infinitely better solution. I was in an auto parts store and noticed a long black squeeze bulb with hose attachments at each end. It looks like it holds 4 to 6 ounces of solution per squeeze. It even has a rubber black arrow premolded on the outside to remind you which direction the water goes when you squeeze it (so you don't put it on your hose backwards).
The big thing is it has double check valves. That means once you hook this up to your hose (how to do discussed below) as water flows into the bulb it is trapped in the squeeze bulb by the first check valve at the front of the bulb. When you then squeeze the bulb it shoots out the other end (past the second check valve) and into your waiting enema recipient. There is zero back flow into the bag or into the squeeze bulb. Further, once you squeeze the bulb and release it, as the bulb re-inflates it sucks more water from the bag into the bulb automatically and in seconds you're ready for another squeeze. This allows you to rythmically squeeze successive bulbfuls into the bottom of your enema sub, (or whomever you are attending to) with all of it going only one place...deep in their bottom.
It also injects the enema solution in one long jet per squeeze which allows me to administer an enema higher from the get go. This helps avoid that problem (especially with newbies to enemas) where their rectum gets initially flooded too quickly with solution and they feel the strong urge to expel in just a minute or so, which can halt a well-intentioned large volume enema. This pump gently injects the solution deeper up the colon, so you can get considerably more volume in your sub before she realizes that, in fact, she has a large enema on board. It allows you to give a larger enema actually more comfortably. And you can use larger squeezes or small short ones to regulate the flow. Constantly monitor your sub to make sure they are comfortable, but this is a gentler way of getting an enema higher (similar to a colon tube but without the perforation danger).
I can't say enough how this has changed how I give enemas. It is a vast improvement.
So where to get this little pump and get it all part of your enema rig? At your local auto parts or marine supply store. It basically is that black squeeze bulb you sometimes see on the hose of an outboard motor on a small boat. That's right, and it costs 6 to 7 dollars. You'll also want a longer hose (though you don't have to, I prefer a longer hose) so I also bought a six foot length of 5/16 rubber hose. Cut the hose into two 3 foot lengths. Take one length and attach it to your existing enema hose (don't forget to pick up a few hose connectors at the same drug store or hardware store you bought the rubber hose from). So now your enema bag has its old hose attached directly to the bag itself, plus an additional piece of hose attached to that hose. Now take the pump and attach it to that rubber hose (make sure the arrow on the bulb is pointing towards the nozzle end). Take the second half of the rubber hose and attach it to the pump in the direction of the nozzle. Finish off that hose with your favorite nozzle (I currently have a large double balloon on mine), and you are ready to go!
Fill the bag full, open the clamp and let the water fill the hoses, and especially fill up the bulb. Give the bulb a few squeezes until you see solution coming out the enema nozzle at the far end and you are ready to use this (this process also clears air out of all tubing and the pump). Insert the nozzle (double balloon tip, barium nozzle, regular tip, whatever) into your favorite subject, open the clamp and give it a good squeeze. Go slowly so your subject is comfortable but you can control how much they take. You can also just let the enema flow naturally with an occasional pump or not at all. Or you can pump faster and give a deep rythmic enema that will leave your sub breathless. Remember to go slowly and always check to make sure your sub is not overly uncomfortable. Stop as needed.
This is such a massive enhancement in giving enemas I can't say enough. Try it if you like. For 6 or 7 dollars for the pump plus a couple of dollars for the hose and connectors, call it 10 bucks all in, it will be the best money you've spent on enema equipment, period.
Have fun. I can be reached by email or Yahoo IM at enematrainer10@yahoo.com, if you have any questions.
Paul