Rosewood, Dry (actually wet) run

I haven't had a lot of time to upload any pic's lately so there's about a week's worth of post's below. it was a pretty busy week, the post are in chronological order, latest first. (4 post on jul 29)

This is a picture of tower 1 at Rosewood looking at it from Providence road. You don't really get a good sense of the size of the building, it's big.... especially when you take into consideration there's 3 of these towers...

So we ran our factory certification pump test with the manufacturer's rep. This is a pic of the 1000 gpm test, 2 - 1 3/4" outlets flowing 500 gpm each at 32 psi on the pitot gauge. We ran another test at 150% and passed. Until you're standing on the back of that truck it's hard to appreciate the force that the pump can generate.

Here's one of Dennis, he won't admit it, but he loves this kind of stuff...

Here's another one, when you run the test you have to throttle the hose valves at the test header to get the correct flow...

And now back to the pool, again we ran into some issues. After removing the spring from the swing check which isolates the city water supply from the pool, we were still drawing a vacuum on the supply line. Jackie was at the pool and said we were getting air bubbles coming up in the pool from the 2 supply lines. Bill our foreman, said that when the pool was drained, there was still water in the elbow below the pool.
We figured out that the contractor that ran the supply line didn't run it level, or actually with a slight grade from the pool to the pump room. The line has a large "bow" in it which creates a substantial air pocket.
Dennis and I switched the wafer check around so we could back flush the line and purge the air from it or "prime" the line. I walked around to the pool to see how much air we would get. Dennis opened the the 8" supply valve and to my surprise, there was a whole lot of air in the line, It actually broke the surface, to about 2' above the top of the water.
I went back out to the truck and we started the pump, I was ready to check the pressure of the outlet, and the pump was shut back down, This started to really bother me, could I have been so wrong 2 years ago? If so, we have bought an extremely expensive pump room that cost more than I make in a year and it doesn't work?
About 30 seconds later, the pump came back on and almost threw me over when it jerked the truck side to side. This time we had the strongest stream yet... 20 psi, which is around 690 gpm with the 1 3/4" outlet. This was even more than we need for the largest demand in the building.

I wasn't wrong :)

Here's one of the flow out of the pool.

So, this is from Friday with the Fire Department. This one's from the pool supply with the new hose monster, which makes testing much easier. We were using the 2 1/2" outlet and flowed a full 998 gpm out of the pool supply. WOOHOO, I was even more right.

Here's a wider view... The storm drains could barley keep up with the flow...
We ended up passing all the test and the pump is now certified. It's kind of a good feeling, after 2 years, every thing works like I thought it would.
Now I think I'm ready for my next high rise...