2017 Mondo Ballast Upgrade - Which Fittings?

[audisnapr]

Ordered a set of the 910's from Wakemakers. One day they were in stock, then not, so I asked how long before they are back, I was told 4-6 weeks! Browsing again the next day and they appeared to be in stock, so I chatted with the online sales rep and they had four available, so I bought two. So we'll see if they actually ship. I've read a few threads here where people struggled to get bags shipped.

Anyway, instead of ordering their kit, it seems cheaper to order 8 fittings and two bags. Worst case it's $420 (bags) and $40 (fittings). The kit is $560. I asked the online sales rep which fittings I needed and he said he couldn't share that information with me and that I should buy the kit. WTF?

Best I can tell, each bag has four (4) ports. For my Mondo, I have a supply and an overflow hose for each side. Both hoses use the Flow-Rite fittings. Looks to me like these Wakemaker male fittings would do the job.

https://www.wakemakers.com/wakemaker...g-fitting.html

Unless, the factory Flow-Rite fittings are 3/4", in which case I need these:
https://www.wakemakers.com/dry-lok-1...g-fitting.html

I measured the factory male port. The ID hole of the fitting is 3/4" but not sure how these are measured.

Anyone know which fitting I need?

[audisnapr]

Update: Bags were ordered and shipped out that same day, to my surprise. So that's good. Kudos to them for being on top of their stock status.

Although the bags were ordered, I still hadn't ordered the fittings. My original post above was incorrect. There are five (5) ports per bag. Two on the top, two on one end, and one on the other end (at least as far as I can tell from the photos). With that, I now needed three plugs and two male fittings for each bag. This adds another $10 to the order. Still, if this all works out, the fittings and bags together will be $90 cheaper than the kit.

I did some more digging with regards to the fitting size. Flow-Rite has a website and their catalog shows photos with dimensions of the fittings. Based on the dimensions shown in the catalog and what I measured in the boat, I'm 99% sure the fittings are the 1-1/8" versions, not the 3/4" version. I placed an order with all of the fittings that I think I need. I'll report back once everything arrives sometime mid next week.

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[audisnapr]

For anyone who is looking and has a similar setup to the 2017 Mondo, I can confirm the following parts are all that you need to install two 910lb bags in the rear lockers.

(2) Item No:B0082 45"L x 20"W x 25"H - 910lbs ballast bag https://www.wakemakers.com/wakemaker...llast-bag.html

(4) Item No: 33092 WakeMAKERS DryLOK 1-1/8" Flow-Rite Bag Fitting https://www.wakemakers.com/wakemaker...g-fitting.html

(6) Item No: M10203 WakeMAKERS 1" Bag Plug with Air Release Functionality https://www.wakemakers.com/wakemaker...ease-plug.html

[Seahawk]

I just ordered the 910lbs for my 2018 Mondo as well. Have not installed yet but commenting as I may need the info you provided when I do go to install. Have you been happy with the upgrade? Current bags that came with mine are Fatsac that measure 46x20x20. So, if my math is correct current bag are 661 lbs each.

Also a driver of my comment is hoping that some on here may be able to shed some light. I ordered upgraded rear locker bags that measure 45”L x 20”W x 25”H – 910lbs.

When converting these dimensions to volume I get 22500 cubic inches. Then converting cubic inches to gallons, I get 97.4 gallons. A gallon of water weighs 8.3 pounds. So, multiplying 97.4 (gallons) by 8.3 (lbs) I come up with a weight of 808.42lbs.

To my question, either my math/info is off, or do these new bags really do not weigh/hold 910lbs, or am I missing something? Maybe I’m not accounting for the extra weight (101.59 lbs) or gallons (12.23) gallons coming from the bags stretching when filled? That just seems like a lot of stretching.

[MLA]

Your math is correct, based on those dimensions. The sacs to not stretch. Another factor is the locker's actual dimensions. So not every locker will allow for a particular sac dimension to fully expand. So this can reduce the sac's real world capacity once in the locker and filled.

[jcredible]

I had a 2017 Mondo and you can remove the carpet divider panel to squeeze a little bit more water in and let the bag raise to 25" high as an FYI