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"markdown": "[Mountain Man Plumbing / Toilets](<https://mtnmanplumbing.com/services/toilet-repair/?agentnet=md>) Sandy, Utah · Salt Lake Valley\n\nBidet seat installation\n\n# Clean water. A better seat.\n\nA bidet seat adds washing to the toilet you already have. A small tee supplies clean water, a mounting plate holds the seat, and the wand extends for washing. Electric versions add features such as warm water, seat heat and drying.\n\n[Call / text (385) 766-8935](<tel:13857668935>)\n\n- [Toilet repair hub](<https://mtnmanplumbing.com/services/toilet-repair/?agentnet=md>)\n\n- [Running toilet repair](<https://mtnmanplumbing.com/services/toilet-repair/running-toilet-repair/?agentnet=md>)\n\n- [Flange & wax ring repair](<https://mtnmanplumbing.com/services/toilet-repair/toilet-flange-wax-ring-repair/?agentnet=md>)\n\n- [Bidet seat installation](<https://mtnmanplumbing.com/services/toilet-repair/bidet-seat-installation/?agentnet=md>)\n\n- [Toilet replacement & installation](<https://mtnmanplumbing.com/services/toilet-repair/toilet-replacement-installation/?agentnet=md>)\n\nInside the toilet / explore in 3D\n\n## Every part has a job.\n\nOpen the tank, follow a flush, then lift the toilet to see its floor seal. Switch on the bidet seat to explore the water connection and wash wand.\n\nKohler Cimarron / elongated\n\nFollow a flush\n\nReady. The tank is full and the bowl holds its standing water seal.\n\nWhole toilet\n\n### A flush from supply to drain.\n\nThe shutoff and supply hose bring in clean water. Tank valves control the flush and refill. The bowl’s built-in trapway leads to the sealed floor connection.\n\n#### What to look for\n\nChoose a part to see what it does and how it relates to a repair.\n\n### Model reference & parts index\n\nThe porcelain toilet and bidet-seat exteriors use Kohler’s K-31648 and K-8298 CAD geometry in inches. The toilet has a 12-inch rough-in and a 16½-inch bowl rim. We built the working tank parts, supply connection and floor assembly for this teaching model. The bowl view traces the water route; colored water makes its movement visible. The flush cycle is shortened for the demonstration.\n\n[Toilet drawing ↗](<https://techcomm.kohler.com/techcomm/pdf/K-31648_spec_US-CA_Kohler_en.pdf>) · [Bidet-seat drawing ↗](<https://techcomm.kohler.com/techcomm/pdf/K-8298_spec_US-CA_Kohler_en.pdf>) · [Bidet operation ↗](<https://techcomm.kohler.com/techcomm/pdf/1441872-5.pdf>)\n\n**Bidet seat**\n\nThis elongated PureWash seat mounts to the toilet’s seat holes. It receives clean supply water and electrical power for washing and other features.\n\n**Retracting wash wand**\n\nThe wand extends from the seat housing and directs a wash stream upward. Stopping the wash ends the stream and retracts the wand.\n\n**Bidet supply tee**\n\nA gasketed tee at the tank inlet divides the clean-water supply between the toilet fill valve and bidet seat. The seat hose runs from its side outlet.\n\n**GFCI-protected power**\n\nThe electric seat plugs into a grounded outlet with ground-fault protection. The GFCI interrupts power if it detects an electrical imbalance.\n\n**Toilet shutoff & supply hose**\n\nThe local valve isolates the toilet. A flexible connector carries cold drinking water up to the fill-valve inlet beneath the tank.\n\n## Start with the shape of the toilet.\n\nMatch round or elongated bowl shape, the mounting-hole spacing and the room between the holes and tank. Skirted toilets and some one-piece designs need particular mounting hardware. The manufacturer’s fit chart helps check the exact combination.\n\n### The example you can explore\n\nOur model pairs a Kohler Cimarron elongated toilet with the PureWash E590, K-8298. Kohler lists this seat family as compatible with elongated Cimarron toilets.\n\n### Check the whole fit\n\nThe seat should sit squarely on its bumpers, its lid should open clear of the tank, and the supply connections should remain reachable.\n\nRead more: [Kohler bidet-seat compatibility chart ↗](<https://www.kohler.com/content/dam/kohler-com-NA/Lifestyle/PDP-PDF/bidet-toilet-seat-f-and-b-compatibility-guide-24-3301-0924.pdf>) · [Kohler PureWash E590 specifications ↗](<https://techcomm.kohler.com/techcomm/pdf/K-8298_spec_US-CA_Kohler_en.pdf>)\n\n## One supply, two destinations.\n\nThe tee fits at the toilet’s fill-valve inlet. One path continues into the tank; the other feeds the bidet seat. Gaskets seal the connections. The seat receives potable water directly from the supply, and used wash water falls into the bowl.\n\n### Non-electric seats and attachments\n\nThese use household water pressure and manual controls. Many provide an unheated wash; warm-water designs have their own connection requirements.\n\n### Electric bidet seats\n\nThese need both water and an appropriate electrical supply. A GFCI detects an electrical imbalance and interrupts power to reduce shock risk. The K-8298 instructions call for a dedicated, grounded GFCI-protected outlet.\n\n### Built-in protection\n\nUse the manufacturer’s complete approved connection kit and backflow protection. Keep the supplied tee, hose and seals matched to the seat.\n\nRead more: [Kohler bidet-seat installation ↗](<https://techcomm.kohler.com/techcomm/pdf/1233549-2.pdf>)\n\n## Extend. Wash. Retract.\n\nSelect “Bidet seat” in the model and run a wash demo. The wand moves out from its housing and directs a small wash stream upward. Stop ends the stream and returns the wand. The real K-8298 has front and rear wash settings, position adjustment and an occupied-seat sensor.\n\n### A weak spray\n\nAn inlet filter or spray tip can collect mineral deposits. The K-8298 guide explains filter cleaning and how to extend the wand for cleaning.\n\n### Seat removal for cleaning\n\nA release lets this seat slide off its mounting plate. Keep slack in the hose and cord so moving the seat does not strain either connection.\n\n### Water near a connection\n\nStop using the wash function and close the water supply. A loose or damaged tee, gasket or hose needs attention before normal use resumes.\n\nRead more: [Kohler bidet-seat operation and cleaning ↗](<https://techcomm.kohler.com/techcomm/pdf/1441872-5.pdf>)\n\n## What we plan before installation.\n\nWe check seat compatibility, the toilet shutoff, the supply hose, mounting access and the route for the bidet hose. Electric models also need the outlet specified by their instructions; any new electrical work is coordinated separately. The installation ends with leak checks and a test of the wash and stop controls.\n\nRead more: [Kohler bidet-seat installation ↗](<https://techcomm.kohler.com/techcomm/pdf/1233549-2.pdf>)\n\nGood questions\n\n## A few more answers.\n\n### Will a bidet seat fit my existing toilet?\n\nMany round or elongated toilets accept a matching seat. Bowl shape, tank clearance and mounting-hole access determine the fit. Send the toilet and seat model numbers before buying.\n\n[Link to this answer](<https://mtnmanplumbing.com/services/toilet-repair/bidet-seat-installation/#answer-will-a-bidet-seat-fit-my-existing-toilet>)\n\n### Does a bidet need a hot-water pipe?\n\nMany electric seats heat their incoming cold water internally. Non-electric models vary: some provide an unheated wash and some use a separate warm-water connection.\n\n[Link to this answer](<https://mtnmanplumbing.com/services/toilet-repair/bidet-seat-installation/#answer-does-a-bidet-need-a-hot-water-pipe>)\n\n### Why does the bidet not spray when nobody is sitting on it?\n\nMany electric models have an occupied-seat sensor. It allows the normal wash controls to operate when the seat is in use. Cleaning modes can extend the wand separately, as described in the seat manual.\n\n[Link to this answer](<https://mtnmanplumbing.com/services/toilet-repair/bidet-seat-installation/#answer-why-does-the-bidet-not-spray-when-nobody-is-sitting-on-it>)\n\nMountain Man Plumbing\n\n## Let’s get your toilet working right.\n\nTell us what happens when you flush—and whether it runs, leaks or moves.\n\n- [Toilet & fixture shutoff valves →](<https://mtnmanplumbing.com/services/shutoff-valves/?agentnet=md>)\n\n- [Moving a toilet in a remodel →](<https://mtnmanplumbing.com/services/plumbing-remodel/?agentnet=md>)\n\n- [Sewer & underground drains →](<https://mtnmanplumbing.com/services/sewer-underground/?agentnet=md>)\n\n### Sources & guide record\n\nThis guide uses toilet and bidet manufacturer instructions, flange installation references and public water-efficiency guidance. The interactive model identifies the products it uses.\n\n[Read the public guide data (JSON)](<https://mtnmanplumbing.com/pb/facts/toilet-guide/guide.json>) · [Read this page as plain text](<https://mtnmanplumbing.com/services/toilet-repair/bidet-seat-installation/?agentnet=md&agentnet_display=html>)\n\n- [Kohler Cimarron K-31648 dimensions ↗](<https://techcomm.kohler.com/techcomm/pdf/K-31648_spec_US-CA_Kohler_en.pdf>)\n- [Kohler toilet installation instructions ↗](<https://techcomm.kohler.com/techcomm/pdf/1476134-2.pdf>)\n- [Kohler toilet service-parts guide ↗](<https://resources.kohler.com/webassets/kpna/brochures/Toilet_ServiceParts_Brochure_FINAL.pdf>)\n- [Fluidmaster refill-tube installation ↗](<https://www.fluidmaster.com/wp-content/uploads/2016/12/400AH-PerforMAX-Fill-valve-English.pdf>)\n- [Oatey: installing a toilet flange ↗](<https://www.oatey.com/resources/project-guides/install-toilet-flange>)\n- [Oatey: repairing a toilet flange ↗](<https://www.oatey.com/resources/project-guides/how-repair-toilet-flange>)\n- [Oatey: setting a new wax seal ↗](<https://www.oatey.com/sites/default/files/2022-11/How%20to%20Install%20a%20Wax%20Ring.pdf>)\n- [Kohler PureWash E590 specifications ↗](<https://techcomm.kohler.com/techcomm/pdf/K-8298_spec_US-CA_Kohler_en.pdf>)\n- [Kohler bidet-seat compatibility chart ↗](<https://www.kohler.com/content/dam/kohler-com-NA/Lifestyle/PDP-PDF/bidet-toilet-seat-f-and-b-compatibility-guide-24-3301-0924.pdf>)\n- [Kohler bidet-seat installation ↗](<https://techcomm.kohler.com/techcomm/pdf/1233549-2.pdf>)\n- [Kohler bidet-seat operation and cleaning ↗](<https://techcomm.kohler.com/techcomm/pdf/1441872-5.pdf>)\n- [EPA WaterSense: residential toilets ↗](<https://www.epa.gov/watersense/residential-toilets>)\n- [EPA WaterSense: checking toilet leaks ↗](<https://www.epa.gov/watersense/fix-leak-week>)\n- [Salt Lake City: what not to flush ↗](<https://www.slc.gov/utilities/wastewaterpretreatment/what-not-to-flush/>)\n\nConnected in your home\n\n## Keep following the plumbing.\n\n- [01 **Toilet repair & replacement →** Compare toilet shape and seat fit with the full fixture.](<https://mtnmanplumbing.com/services/toilet-repair/?agentnet=md>)\n- [02 **Fixture shutoff valves →** Understand the supply valve, tee and hose connection.](<https://mtnmanplumbing.com/services/shutoff-valves/fixture-shutoff-valves/?agentnet=md>)\n- [03 **Backflow protection explained →** Learn why drinking-water protection matters at an added connection.](<https://mtnmanplumbing.com/services/backflow/?agentnet=md>)",
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