Quick question on Rule 405FC pumps...

[IDBoating]

These come with two hose fittings - straight and 90 degrees. They have NPS threads and an o-ring. From this I presume it's acceptable to not completely tighten down the 90 degree fitting, and rely solely on the o-ring for a watertight seal? Otherwise the departure angle of the hose is at the mercy of wherever the shoulders happen to meet, since the NPS threads will just keep spinning.

Just feels "weird" to have a watertight fitting spin free like that. Is this how everyone is using the 405FC's 90 degree fitting?

[chpthril]

if its moving, its not water tight. I always add a dab of 5200 to keep the tension of the hose from backing off the fitting if its pushing the right direction. But yes, it needs to be tight so it compresses the oring.

[Timmy!]

Has anyone else on here even used those pumps?

[chpthril]

Has anyone else on here even used those pumps?

All the time! Love um.

http://www.tigeowners.com/forum/show...pump+flow+test

[IDBoating]

if its moving, its not water tight. I always add a dab of 5200 to keep the tension of the hose from backing off the fitting if its pushing the right direction. But yes, it needs to be tight so it compresses the oring.

I would have presumed precisely that, except that the packaging separately discusses the 360 degree rotatability of the pump, and the 360 degree rotatability of the fitting. (I don't have the packaging here at work or I'd quote it directly.) If that's not true, then the departure angle of the hose is at the mercy of whenever the molded parts happen to seat. In my case that's about 5-o'clock, almost pointed straight down at the hull. Not very useful.

Also, are you certain the o-ring gets compressed only when the fitting is snug? The o-ring is on the OD of the male portion, not at the end. And it looks like the female mating surface of the fitting (against which the o-ring would seat) is not tapered. There's no "cush" feel when the fitting seats, like the o-ring is being compressed - it just stops. I agree the o-ring needs compression; what I'm saying is that I'm not sure there is additional compression when the parts seat.

Just trying to reconcile what my logic tells me with what the packaging says and what I'm seeing on the physical parts. It would be really convenient if that fitting could be rotated a bit, but not at the expense of leakage. Perhaps a dab of 4000 or 4200 or {gasp} 5200 on the threads, permitting the desired angle?

Thanks!

[chpthril]

I would have presumed precisely that, except that the packaging separately discusses the 360 degree rotatability of the pump, and the 360 degree rotatability of the fitting. (I don't have the packaging here at work or I'd quote it directly.) If that's not true, then the departure angle of the hose is at the mercy of whenever the molded parts happen to seat. In my case that's about 5-o'clock, almost pointed straight down at the hull. Not very useful.

Also, are you certain the o-ring gets compressed only when the fitting is snug? The o-ring is on the OD of the male portion, not at the end. And it looks like the female mating surface of the fitting (against which the o-ring would seat) is not tapered. There's no "cush" feel when the fitting seats, like the o-ring is being compressed - it just stops. I agree the o-ring needs compression; what I'm saying is that I'm not sure there is additional compression when the parts seat.

Just trying to reconcile what my logic tells me with what the packaging says and what I'm seeing on the physical parts. It would be really convenient if that fitting could be rotated a bit, but not at the expense of leakage. Perhaps a dab of 4000 or 4200 or {gasp} 5200 on the threads, permitting the desired angle?

Thanks!

Ok, I am holding one right here, right now. You are correct about the oring sealing on the ID of the fitting. My mistake, ive been plumbing in 7 t800's for the past two days and they use a ribber washer that gets compressed to seal, sorry.

Now, the 405Fc pumps I have have a solid straight and solid elbow. So given that the oring seals the between the ID of the fitting and the OD of the pump body, the fitting deosnt have to be gorilla tight in order to be a water tight seal.

[IDBoating]

Now, the 405Fc pumps I have have a solid straight and solid elbow. So given that the oring seals the between the ID of the fitting and the OD of the pump body, the fitting deosnt have to be gorilla tight in order to be a water tight seal.

That's my theory, too. But I like your idea of some sealant. I think I'll use the elbow but put some 3M 4000 on the threads, both as a sealant and a mild threadlocker. As I've proven in the last couple of days, 4000 can be backed off if necessary.

Thanks for the sanity check, I appreciate it!

[majestic]

Has anyone else on here even used those pumps?

I swapped my t-800 fill pumps for them.