I ask because I’m considering the same issue. My 34 had the same type of tank you described, and Ronco had a direct replacement. I liked the bottom drain because the tank empties by gravity in addition to the pump at pump out. I have been less enamored with the dip tube configuration on my 42. The outlet seems more prone to releasing odor, either because the dip tube is held in place by a rubber gasket or because more sewage is left at the bottom of the tank. Anyone else have any thoughts on this?
Sent from my iPhone > On Jan 24, 2020, at 5:16 PM, Adrian Humphreys via CnC-List > <cnc-list@cnc-list.com> wrote: > > Also, there is a lot easier access to the tank top for plumbing in our case. > Working room at the bottom of the vee is very restricted. > > Adrian Humphreys > Telamon Technologies, Inc. > POB 396, Rockport, ME 04856 > 207-763-4691, mobile: 207-542-2312 > adri...@telamontech.com > > > >> On Jan 24, 2020, at 5:09 PM, Adrian Humphreys via CnC-List >> <cnc-list@cnc-list.com> wrote: >> >> With the dip-tube, there is no potential source of leak or weakness at the >> tank bottom. Any leaks around a fitting would be at the tank top and not >> under pressure, so you could caulk. We empty either at the marina pump-out >> or with the diaphragm pump where allowed, so it makes no difference where >> the outlet is when emptying. >> >> Holding tank contents want to stay inside the tank for sure. >> >> Adrian Humphreys >> Telamon Technologies, Inc. >> POB 396, Rockport, ME 04856 >> 207-763-4691, mobile: 207-542-2312 >> adri...@telamontech.com >> >> >> >>> On Jan 24, 2020, at 4:58 PM, Matthew L. Wolford via CnC-List >>> <cnc-list@cnc-list.com> wrote: >>> >>> While on this topic, we did you choose the dip-tube over the bottom drain >>> outlet? >>> >>> Sent from my iPhone >>> >>>> On Jan 24, 2020, at 4:54 PM, Adrian Humphreys via CnC-List >>>> <cnc-list@cnc-list.com> wrote: >>>> >>>> Ronco-Plastics.com >>>> >>>> They have ready-made tooling for a lot of different tanks, and will work >>>> with you to find one that fits your need. Make a dimensioned drawing for >>>> them. The tank is roto-molded when you order, so you can specify the >>>> fittings you want. The original tank under the v-berth on our C&C-33 had >>>> the outlet at the bottom of the vee where it had cracked and leaked. We >>>> specified a "dip-tube" outlet, so all the fittings (inlet, vent, >>>> inspection port, and outlet) are on or near the top. The tank we chose is >>>> a very close match to the original and fits the space well. They will also >>>> create custom tooling, but IIRC, the price estimate started at $2,000+ >>>> >>>> Cost was a little over $300 for our 18 gallon tank and fittings; UPS >>>> shipping from California was almost half that. Rich Gray at Ronco was a >>>> great help. >>>> >>>> We added all new plumbing, larger vent, hand bilge pump to empty it, an >>>> external sensor kit from ferriellosales.com/monitoring-systems.html >>>> ($150.00), and a lot of labor. The Peggy Hall book was essential to the >>>> planning (amazon.com/New-Get-Rid-Boat-Odors/). >>>> >>>> Adrian Humphreys >>>> Epilogue, Rockport ME >>>> C&C 33-2 >>>> adri...@telamontech.com >>>> >>>> >>>> >>>> >>>>> On Jan 24, 2020, at 9:30 AM, John McCrea via CnC-List >>>>> <cnc-list@cnc-list.com> wrote: >>>>> >>>>> Hello. I am in the process of replacing the holding tank on our 1979 C&C >>>>> 36. We bought the boat in 2018 and it had a bladder for a tank under the >>>>> v. I want to go back to the original configuration of the 24-gallon >>>>> plastic tank. I visited a sister ship last weekend and after taking all >>>>> the dimensions, I found the tank on the Kracor website. Kracor no longer >>>>> sells to the public. Through some marine industry connections, I did find >>>>> out that Tartan does have the toolings for that tank but said that be >>>>> prepared to pay a lot for it. As in over $500. Does anyone else know of a >>>>> source for either a custom tank or something similar to the original? >>>>> Thanks! >>>>> >>>>> John McCrea >>>>> Talisman >>>>> Mystic, CT >>>>> _______________________________________________ >>>>> >>>>> Thanks everyone for supporting this list with your contributions. Each >>>>> and every one is greatly appreciated. If you want to support the list - >>>>> use PayPal to send contribution -- https://www.paypal.me/stumurray >>>> >>>> >>>> _______________________________________________ >>>> >>>> Thanks everyone for supporting this list with your contributions. Each >>>> and every one is greatly appreciated. If you want to support the list - >>>> use PayPal to send contribution -- https://www.paypal.me/stumurray >>>> >>> >>> >>> _______________________________________________ >>> >>> Thanks everyone for supporting this list with your contributions. Each and >>> every one is greatly appreciated. If you want to support the list - use >>> PayPal to send contribution -- https://www.paypal.me/stumurray >>> >> >> >> _______________________________________________ >> >> Thanks everyone for supporting this list with your contributions. Each and >> every one is greatly appreciated. If you want to support the list - use >> PayPal to send contribution -- https://www.paypal.me/stumurray >> > > > _______________________________________________ > > Thanks everyone for supporting this list with your contributions. Each and > every one is greatly appreciated. If you want to support the list - use > PayPal to send contribution -- https://www.paypal.me/stumurray > _______________________________________________ Thanks everyone for supporting this list with your contributions. Each and every one is greatly appreciated. If you want to support the list - use PayPal to send contribution -- https://www.paypal.me/stumurray
