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Old Faythful

Rated 5.0 out of 5
2 Reviews

Sale price Price $69.00 Regular price Unit price  per 


A tried and true design that's based on the best bidays throughout history, Old Faythful is our simplest and most easy-to-use model. Set up, sit down, ahhhhhhh.


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A Better Way To Do Your Business

BIDAY bidets are a sleek and hygienic answer to some of life's dirtiest problems, designed to clean your butt with a concentrated, yet gentle, stream of water. Ahhhh. With a clean, simple finish and understated shape, BIDAY products are perfect solutions for an easy-install, low profile toilet attachment. If you want it, you'll see it. If guests want paper, they'll pass. Either way, your poo game will never be the same.


  • Angle Adjuster: Move nozzle back and forth to get the perfect stream for a precise clean
  • Pressure Control: Gentle rinse or power wash? BIDAY how you may
  • Sliding Fastener: Bind your BIDAY to your toilet. You'll never want to separate them
  • Nozzle: Works hard to clean your bum!


BIDAY Fit Guide

Standard Two-Piece Toilet
One-Piece Toilet
Flex or Hard Hose
Two-Piece Toilet


One-Piece Toilet

Works most of the time

Flex or Hard Hose



BIDAY Fits on almost all standard two-piece toilets. Ensure that there is 1.5" between the tank and seat mounting holes. BIDAY is designed to work with any toilet connection using the parts provided! Simply replace your current tubing or plumbing with the adaptor and flex hose, and you'll be good to go.

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Get the Waterjay with temprature control!
average rating 5.0 out of 5
Based on 2 reviews
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100% of reviewers would recommend this product to a friend
Customer photos and videos
Review posted
Reviewed by Niko P.
Verified Buyer
Rated 5 out of 5


Yes, Old Faythful coming through in the clutch when you want to get clean after you did the thing!

Yes YES!!!

I recommend this product
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Review posted
Reviewed by Jake
Verified Reviewer
Rated 5 out of 5

A Butt-Changing Affair

I honestly didn't think I needed a Bidet until I made this purchase. It was easy to install and I feel like my overall health (including my butt) has skyrocketed. This makes going to the bathroom more affordable (less toilet paper) and more fun! Would recommend this product to everyone I know!

I recommend this product
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Installs in 4 Easy Steps!

  • Remove the toilet seat
  • Attach BIDAY to your toilet and adjust the sliders to fit
  • Connect BIDAY to clean water supply
  • Place seat back and enjoy!
Included Parts: Adapter, Rubber Washer, Water Source Hose, Hot Water Source Host, Teflon Tape, Rubber Pads  You may also need: Wrench, Screwdriver

How Does A BIDAY Work?

If you're a first-time BIDAY-er, you might have many questions and wonder how they actually work. Rest-assured that BIDAY's got your back! BIDAYs are devices designed to shoot a concentrated steam of water at your butt with a gentle but powerful splash. It'll take away fecal matter and grime after your poop (or sex), leaving you a clean, cool, and refreshed butt. BIDAY also has a self-wash function which keeps the nozzle clean. BIDAY's water come straight from clean water supply and is super easy to install and use. Try BIDAY today! Once you switch, you'll never look back.



Ready to BIDAY?

Ready to BIDAY? Shop Now!
Check out some of the most common questions below!
Or, go to our FAQ page and How It Works page for more information.

BIDAY Basics

The water comes straight from your tap, clean and fresh.

Simply pat dry with toilet paper.

The warm water hose connects to your bathroom sink's hot water connection. Therefore, The Waterjay works best when your toilet is within 9 feet of the sink.

Nope! BIDAY is 100% environmentally friendly and doesn’t use any electricity.

Both Old Faythful and The Waterjay contain a self-cleaning nozzle feature. When turned on, the nozzle will wash itself to remove any leftover residue. This ensures every spray comes at you fresh and clean!


When assessing whether your toilet is compatible with BIDAY, there are a few things to keep in mind. For standard, two-piece elongated and round toilet models, your BIDAY should fit right in. However, it will fit some one-piece toilets as long as there is enough space beneath the toilet seat in front of the tank (about 12.5” from the centerline of your toilet). Also be sure there is easy access to the water supply hose behind  the toilet, so you can run the water hose (included in the box) to BIDAY.

Absolutely! Removal and attachment is simple and can be done in under 10 mins. You can easily reinstall it wherever you settle next.

Use the adapter provided in the box to connect BIDAY to the water supply that fills your toilet tank. The included hose will connect the adapter to BIDAY. Simple as that!

Watch our installation guide video above or check our "How It Works" page.

You only need 12.5" from the centerline of your toilet in order for BIDAY to fit into any tight space.

Health & Hygiene

Absolutely! The Angle Adjuster allows you to control which area to wash. It’s great for refreshing yourself during your monthly visit from Aunt Flow, or before and after sex. BIDAY is the most effective way to remove fecal matter without spreading it into unwanted areas.

Yes! BIDAY removes all fecal matter with a precise, concentrated stream, and avoids chemicals and residue from using toilet paper. It also prevents irritation from excessive wiping and the hard-to-get-rid-of dirty feeling.

Toilet paper leaves behind residue that can cause UTIs, yeast infections, rashes, and hemorrhoids. Moreover, the toilet paper industry causes astronomical harm to the environment. On average, one toilet paper requires 37 gallons of water to produce. That’s 135 trillion gallons of water a year in the U.S. alone! A BIDAY uses about ⅛ the amount to clean and flush, significantly reducing your carbon footprint by not supporting the destruction of trees and clean water.

Not at all! Wet wipes may be convenient and accessible, but chronic use of wet wipes leads to significant skin breakdown and increased sensitivity, irritation, cracking and fissures. This can provoke an occurrence of anal condyloma (aka anal warts) in HPV positive individuals. Additionally, wipes can cause a series of plumbing problems and are harmful to the environment.

Shipping & Returns

All of our products come with a One Year Warranty if registered within 30 days of purchase.

Of course! However, there is an additional shipping fee to send your BIDAY outside of the U.S. Simply add your shipping address to the cart and it will calculate your shipping charge automatically.

We will process domestic U.S. returns on undamaged BIDAYs within 60 days of purchase. We offer a one-way freight policy, wherein customers who pay freight for their order are eligible for a return label. Customers who received free shipping are responsible for shipping costs on any returns or replacements. Our BIDAYs come with a 12-month guarantee on equipment and parts. We will promptly replace any defective parts, free of charge, within the specified warranty period. Contact us to request a replacement part or BIDAY.

Why Use A BIDAY?

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Improved hygiene keeps your bum healthy!

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Feel fresh and clean after every bathroom visit.

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Better for you, and for the earth too!

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Save Money

Less TP, more savings!