Originally Posted by Stiff N' Wett
^^^ this is completely false when you let the prv "sing" that's when you get sand and grit in the valve that eventually gums it up. Private boaters know when their floor is right on and don't have to over inflate. The difference between private boaters and comercial boaters is that private boaters learn the hard way by trial and error and a commercial guide has been told how to do everything. If your worried about pinching the prv valve and you switch the boat around then your intake valve will be the issue(with most boats not aire). It's funny that you've had a prv bubbling at you on every trip and every time you pump up a boat you let it sing. That should be telling you something!! It tells me to never listen to a commercial raft guide unless maybe he's telling me a good line on the one river he runs... Actually I wouldn't even take that advice!!
Pardon the long rambling response... but I can talk boating all day when there is no snow.
I have a feeling this is going to be like talking to a brick wall, but I am willing to hear you out, and try to discuss this without insults. FYI, you're chatting with one of the guy's who tells people what to do because he has done the trial and error.
Comparing commercial boaters and private boaters... you can't. There is a reason why we don't get the same warranty. Private boaters treat their boats like a garage queen Ferrari, commercial boaters abuse theirs like baja trophy trucks. Our goals are completely different and we can't really compare because we're not in the same league so to speak.
Notice how I said commercial and private... I am both, and I was private long before I was ever paid. If I had remained a private boater, I might have 50-100 different trips under my belt. As a commercial/private boater, I have thousands of documented trips on a quite a few different rivers in the US. That's right, not just one river, dozens. During this time in my life, I built a company from the ground up. We started with one boat and a van; we now have 5 vans, a 30 passenger bus, and 16 boats. The boats range from regular ST Sotars, custom CAD drawn SL Sotars, one custom reverse diminished Wing, multiple AIRE's, Vanguard's, and even a few old Hysides. If they came with foot-cups, they were in the front, and valves in the rear from the factory. We figured everything out by listening to other boater's, the manufacture's, and using trial/error. All the boating knowledge I have was acquired by making mistakes and listening to others. This is something you should try. Even first timers have good ideas, because "there are 250 ways to do the dishes."
Do you know what the sun does to the air inside a raft? It creates expansion, causing the relief valve to operate randomly throughout the entire day. If it doesn't burp, it's not topped off or it's broken. This happens on the 40° aquifer/glacier fed and 70° sun-baked lake fed rivers, every day the sun is out. This expansion is one reason why raft manufacture's test at greater PSI than they recommend. If you don't let the valve burp, I assume you check the floor and every tube with a pressure gauge as you pump. We have a PSI gauge, it has a lot of dust on it. That is the only way to know when the floor is fully inflated without the pressure valve releasing. Have fun with that... Maybe take your frame off and paddle boat a little. That will get your floor out of the shade and activate the relief valve.
If the relief valve is getting gummed up, you might have too much grease in your pump. Sand is not gummy. By letting the valve operate, it will blow the sand/water/whatever out of the operating area. Sand gets in there when there is no back-pressure, like when a boat is being rolled. If you're getting sand in your boat, you should try rolling it in grass or on a trailer. Also try telling people to dip/rinse their feet in the water before they come aboard. That will help. Intake valves are completely different, the inner nut is longer and has protection tabs. It should survive an impact. Most boats made these days have both on the same end of the floor(the stern) to minimize the chance of impact. All our valves get stripped and cleaned/replaced as needed every two years. This is regular maintenance. Rafts are boats, boats are money pits, money pits need up-keep.
As for listening to commercial guides about lines... why don't you just read the water and take your own line?