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Replacing failed membranes in a SeaWater Pro watermaker took two hours of real-time work, documented with a chest-mounted camera and an on-screen timer to show the unedited pace of the job.▶ 0:14 The watermaker is installed under the forward mattress in a modular configuration with two 40-inch membrane housings.▶ 0:31 The membranes had failed after several years of use, contaminating the tanks with salt water.▶ 0:05 Spare membranes had been carried aboard for years, avoiding a quoted replacement cost of $1,500 per membrane.▶ 1:16 Removing the housings went smoothly, but disassembling the end caps required a small hammer to drive corroded threaded rods free.▶ 5:08 On the second housing, using vice grips to pull a stuck end cap snapped the membrane's nipple off inside the aluminum end cap.▶ 10:26 Extracting the broken piece without destroying the soft aluminum or the internal O-ring required Allen wrenches, a screwdriver, and percussion.▶ 13:50 The O-ring sustained a small cut during extraction, and no spare of that specific size was aboard; water was used as lubricant to seat the new membrane.▶ 14:21 A Dremel cleaned a gouge inside the housing left by the extraction.▶ 16:20 After reinstallation, the system was purged of air with the low-pressure boost pump before the main pump brought pressure to 900 PSI, and the watermaker produced clean water.▶ 17:31 Corrosion on threaded rods and the directional orientation of flared seals are the two details most likely to turn a straightforward membrane swap into a multi-hour extraction problem.

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