Tank to Pump Check Valve - Anyone know it's first year in NFPA 1901?

[txgp17]

Title pretty much says it all.

I learned to pump on a 71' American LaFrance, and I don't recall it having one. Anyone know what year these started showing up in the NFPA regs?

[Johngagemn]

Title pretty much says it all.

I learned to pump on a 71' American LaFrance, and I don't recall it having one. Anyone know what year these started showing up in the NFPA regs?

I believe they became required in the 1991 revision of NFPA 1901. Most pump manufacturers had them available long before that. I know we began offering them on our midship pumps in 1968 at Waterous.

[txgp17]

I believe they became required in the 1991 revision of NFPA 1901. Most pump manufacturers had them available long before that. I know we began offering them on our midship pumps in 1968 at Waterous.

Might have been in the next revision. We have a 94' in our inventory and I spoke with one of the operators, she said it has no check valve on the P2T line.

[MG3610]

Might have been in the next revision. We have a 94' in our inventory and I spoke with one of the operators, she said it has no check valve on the P2T line.

Some of these check valves are right inside the pump casing, and not in the piping. Unless you knew the pump had one its basically invisible.

[txgp17]

Some of these check valves are right inside the pump casing, and not in the piping. Unless you knew the pump had one its basically invisible.

Right, if I'm not mistaken the Hale Q-Max is integrated into the manifold. However, the person commenting on that particular truck, described filling the tank through the P2T line, not a visual inspection.

[Rescue101]

Right, if I'm not mistaken the Hale Q-Max is integrated into the manifold. However, the person commenting on that particular truck, described filling the tank through the P2T line, not a visual inspection.

And THAT would pretty much negate it having a check valve,hehe T.C.

[LFD2203]

Seems we had some 1987 ALF's with the check valve in the tank to pump piping. I don't think we would have asked for it, so I think it was required.

[txgp17]

Seems we had some 1987 ALF's with the check valve in the tank to pump piping. I don't think we would have asked for it, so I think it was required.

I'd venture to say that the ALF of 1987 included it on their own. The original ALF was a fairly high-end manufacturer, who didn't produce much junk.

I was born & raised on a 71' & 82' ALF's on Ford commercial chassis, both with gas engines, manual transmissions, and 2-stage pumps. It really makes you appreciate a modern diesel/automatic with a single stage/governor combination.

[GreggGeske]

Might have been in the next revision. We have a 94' in our inventory and I spoke with one of the operators, she said it has no check valve on the P2T line.

It definitely was the 1991 edition. The 1985 edition only states that "When specified by the purchaser in Special Provisions, a check valve shall be provided in the tank-to-pump line".

[LFD2203]

I'd venture to say that the ALF of 1987 included it on their own. The original ALF was a fairly high-end manufacturer, who didn't produce much junk.

I was born & raised on a 71' & 82' ALF's on Ford commercial chassis, both with gas engines, manual transmissions, and 2-stage pumps. It really makes you appreciate a modern diesel/automatic with a single stage/governor combination.

These were poorly designed/spec'd apparatus anyway. On Ford L-9000 chassis, underpowered, under braked, had 1,000 gal tanks with 3/4" tank fill lines. I feel certain the check valve caught us by suprise as previous apparatus could "back fill" through the tank to pump piping. These were supposed to be our big leap into rural fire protection.........not a lot of help.