Looking for some feedback, new build

[DennisP]

Hey guys, I am in the process of a complete backyard redo and I am looking for some feedback on some choices...

For starters the pool is a 27ft x 54" Sharkline Morada hybrid pool. Resin lower rails, bottom plates and upper rails, steel wall, posts, top plates and reinforcement ring. It is a used pool, but in good condition.

I bought a new beaded liner, bead receivers, wall foam and adhesive and foam cove. I will be putting down 1.5" foam flooring in lieu of sand (I am erecting the pool on top of 4-6" thick crushed limestone that will be vibratory compacted in 2" lifts, so the entire thing will be very solid and I don't want to deal with the mess with sand).

I also picked up the rest of the equipment needed, which include a new Pentair Dynamo 1.5hp 2-speed pump, Hayward widemouth skimmer, Burndy bonding plate that goes in the skimmer and a Confer 7200 ladder. I also found some great deals on used equipment that is in excellent shape (new or near new) which includes a Sta-Rite System 3 27M120 300sq/ft cartridge filter, Sta-Rite T-210WF 2.18sq/ft 200lb sand filter (backup) and a Jandy Lite2 250k BTU natural gas pool heater.

Now, I plan on using the cartridge filter and running the pump on low-speed pretty much 24 hours. I figure I will set the timer to switch to high-speed for an hour in the morning and an hour in the evening.

This is a "unique" install in that I am installing the equipment to an equipment pad at the back of the garage and running PVC underground to the pool 70ft away. This place originally had an in-ground pool and it was pulled 2 days before we looked at the house back in spring of 2012. So I have all the electrical run already and it is much easier (and cleaner overall) to run the equipment at the equipment pad.

So, since I have most of the materials for the project here (including 5400 Holland pavers, 18 yards of crushed limestone and all the pool stuff) so I have started replumbing to the equipment pad. I have disregarded the 5 original 1.5" black poly lines the original pool company installed and put in 3 2" PVC lines.

The original pool had a pressure cleaner and 3/4" black poly line. I don't plan to use it, but that got me thinking and I am wondering if I shouldn't install a 3/4" PVC line to just in case I might want to run a pressure cleaner at some point?

Now, I figure I already have an extra 2" line, using the other two as a suction and return, but since I never plan to replumb back to the equipment pad ever again, I only want to do this once. To say it has been a major PITA is an understatement. I used 3/4"/1"/2" steel pipe with one end cut on a 60 degree angle and knife-edged to drive through not only the clay under the walkway to the equipment pad, but also all the original plumbing lines. Driving another 3/4" line is no big deal (I already had to drive one to add some 3/4" PVC conduit to run some wiring for the outdoor kitchen) as well as 1" for the natural gas lines for the outdoor kitchen as well (I am running to two locations to have options, with both getting 20-amp 120v electrical and the first having 1" gas line and the other 3/4" gas line).

I don't know what the future holds, but I have not counted out the possibility of another in-ground pool at some point, but the 27ft pool and a 1200 sq/ft paver patio will do us just fine for more than a few years... I figure I could always configure 2 of the 2" lines as suction lines (main drain/skimmer) and then use the last 2" line as a return I would just Y-out for returns near the pool if we go that route in the future. I really have no interest in driving the 2" pipe for another 2" PVC line, but a 3/4" line is no big deal. But, if I should reconsider and possibly run another 2" line, I might just have to "suck it up" and do it.

Beyond that I am hoping we get another week and a half with no rain so I can get a skid steer in and get the big stuff done. For now we have rain forecast for 4 days, so that sucks.

Any input or commentary on the rest of the project is welcome as well.

[BigDave]

Are you going to put a main drain in the AG(code probably requires two)? I kinda wish I had one. Also wish I had two returns. One skimmer seems to work fine. 2" pipe makes sense for the long run but you could certainly Tee to 1.5" for main drains and returns close to the pool.

[DennisP]

Yeah, looked into it briefly and yeah, if you put in a main drain it is just "safe" to run two of them...

But, yeah, I considered a couple of main drains, two returns and a single skimmer... Like you said I could always run multiples by teeing off at the pool itself...

So when I plumbed the equipment pad I have an extra line available for feeds and figure a single for returns is ideal...

So, if I put multiple returns in, how far apart should they be? I don't think they would need to be 180 degrees out from one another on a round pool...

I just got done with the plumbing... What a royal PITA... I only had a couple of tricky locations to really "work the angles" so to speak...

I did use a Jandy 3-way valve for heater select/bypass and Jandy check-valve by the filter, and for the heater back-flow I just used a gravity-based flap valve... I have a ball valve on the other side of it, so that I can positively shut-off the connection for servicing the heater.

I am sure if I did this kind of plumbing all the time it would have gone faster... I do now know why the pool builders use 1.5" PVC over 2"... It makes quite a bit of difference in pressure to hold 2" pipe into fittings compared to 1.5"... Enough to make me prefer working with 1.5" if possible...

But, now that all of that is done I can focus on everything else... I forgot to add-in the 2" ball valves for isolating the pad equipment, so once I add those in I will take some pics and post them...

[CarlD]

Just a comment from someone who's not THAT knowledgeable about "feet of head" and all that stuff:
It seems to me that running 70' underground two ways from the pool to the pump would really increase the resistance to flow and 2" PVC would relieve that having nearly double the cross-sectional area over 1.5" PVC.

[BigDave]

... So, if I put multiple returns in, how far apart should they be? ...

I think the law is three feet. Four or five feet would be safe. The idea is to prevent entrapment - so, far enough that one person can't cover both at the same time.

[DennisP]

I think the law is three feet. Four or five feet would be safe. The idea is to prevent entrapment - so, far enough that one person can't cover both at the same time.

No, I meant eyeball returns, not drains...

Yeah, I looked up the national code on the drains... Five feet are the preferred spacing, so for the dual main drains 5 feet it is...

I will be adding dual drains... Ordered everything up today that needed to be and bought the rest of the SCH40 2" fittings locally... I am putting in dual 2" main drains teed into a single 2" line... Since everything else is 2", why go with 1.5" on anything is my thought...

Also, I will be hardpiping them with 2" SCH40 PVC just like everything else... I figure why use flex PVC underground since there are always concerns about leaks and issues over time... seems like properly run and solvent-welded SCH40 PVC or even black poly tubing are the preffered methods...

I also figure the hardline with the tee in it will afford for a more solid mounting of the drains... I don't think I really want to mess with using concrete to set them... I figure I will mount them about 1/2" down from the top of the 1.5" foam floor and compress the foam around them so that it kinda funnels down to the drains... That way the kids will be less likely to mess with where the vinyl connects to the drain top... I also hope the foam coupled with the hardline piping should make them pretty stable long-term...

[BigDave]

No, I meant eyeball returns, not drains...

My bad. Sorry. Doh!

... Since everything else is 2", why go with 1.5" on anything is my thought...

As you point out 1.5" is easier to assemble, fittings are cheaper, 2 x 1.5" has about the same cross section area as 1 x 2". OTOH no reason not to build it with 2".