Proprietarily designed, the Bájoc Harmonic Waterkey Plugs were made to eliminate notal tone disruptions and allow for proper notal tone frequencies to flow smoothly inside of the slide crook and/or body tube and over the waterkey dispensary.

• It features a brass plug that sits in the waterkey cup and has a brass stem that fills the inside section of the waterkey dispensary. This results in lever waterkey assemblies
responding acoustically similar to push-button waterkey assemblies.

• The waterkey plug, when effectively seated into the waterkey cup, acts as a harmonic
balancer weight while also allowing for the plug’s stem to fill the empty chamber space inside of the waterkey dispensary.

• The purpose of making the waterkey plug out of brass is to avoid causing adverse distortions and suppression of the instrument’s natural resonance—which can occur from having a full rubber or full cork material.

• What allows for an effective seal of the plug onto the waterkey dispensary is the use of a “Gummi Kork” O-ring that is inlaid flush onto the beveled lower base of the plug’s stem—to prevent any sort of air leakage from coming out of the slide crook and/or body tubing.

The results of effectively “plugging” the waterkey dispensary are:
• Having an even flow and distribution of notal tones throughout the general section
of tubing which will lead to having a true, balanced response and resistance to the player when sounding the instrument.

                                            Available in 4 size options

• Size Option #1 — Besson (Sovereign/Prestige), Jupiter XO, Kanstul, UMI (King Silver
Flair, Benge Leonore 90B, C.G. Conn Vintage One, etc.), Yamaha (short waterkey pipe)

• Size Option #2 — Bach Stradivarius/Omega (main tuning slide ONLY), Yamaha (tall
waterkey pipe)

• Size Option #3 — Adams, B&S, CarolBrass, Eclipse, F.E. Olds (standard [not side-lever
action] waterkey assemblies ONLY), Schilke (all available series), S.E. Shires (Trumpets,
etc.), VanLaar

• Size Option #4 —Bach Stradivarius/Omega (3rd and 4th [Piccolo] valve slide ONLY), S.E. Shires (“Q Series” Euphoniums, etc.)