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SMR Tap Valve 3984R 20 Splines



SMR Tap Valve 3984R 20 Splines, with Red and Blue seals. [Previously called the 1212R Valve on some installation guides]. Please read below before ordering as there are certain Taps that you need to buy the original White sealed version for which is also presented here to you as an option.
If your Tap is dripping from the Spout then you might need to change your Valves.  Here is our Guide 7 Easy Steps to replace Kitchen Tap Valve.

If your Tap is dripping where the Spout meets the Base you might need to replace your  O Ring Kit.


SMR Tap Valve 3984R

With Red Seal and Blue Seals.
The Hot Valve opens Clockwise. The Cold Valve opens anticlockwise.
Measurements: Height 50mm / Diameter at thread 21mm / Splines 20 / Nut Height 8mm

Before ordering please read the following in case you need to order the White Sealed Version of this Valve , 1212R which you can buy here too if you click on the options to purchase.

  • If your own valve has White seals rather than blue or red, we would recommend that you purchase the original 1212R valve.
  • If your own valve is stamped ‘San Marco’ we would recommend that you purchase the original 1212R valve.
  • If your own Tap is over 10 years old, we would recommend that you purchase the original 1212R valve.
  • If you have the Averon Tap or the Emporia Tap, then you need to order the 1212R Valve. You cannot use the 3984R valve as a replacement in your Tap.
  • If you are unsure, then we would recommend that you purchase the original 1212R valve.
1212R Valve Blueprint

1212R Valve Blueprint


This is a Genuine Spare Part.

Parts might be modified by the manufacturers as part of their continual improvements. We cannot always guarantee that a part will fit an older version of a product. All spare parts that do not fit can be returned for a refund excluding shipping costs.

We ship from Ireland.
Current Shipping Times
{Prevent unnecessary delays - Put in correct details at Checkout} :

ROI / NI approx 2 days delivery by Courier (Post might take longer).  GB: It currently takes approx 1 week for goods, once dispatched with DPD, to be delivered.  But it can occasionally take longer than this which is outside of our / DPD control (customs clearance following Brexit has increased shipping times). Occasionally, when volumes very high , it can take longer.  It will take longer by Post.  Click here for more detailed information about all Shipping & Returns.

Shipping Costs (P&P):

Post (Not trackable) £2/£3.50 / Courier (Trackable) £5/£7:   We make no profit from Shipping (what we charge for Couriers does not even cover full cost).  For very small items: Screws, O Ring Kits, Aerators & some Bushes, we Post (£2/£3.50) .   Where we Post, and you have been incorrectly charged Courier Rate £5/£7, we will refund the excess shipping charge to you.  Some Bushes due to size cannot be posted.  Shipping costs include VAT and costs of packaging.  If you do not want a small item posted, but would prefer it to be Couriered, please email us when you have placed your order as you might be required to pay an additional charge to cover the increased Shipping Costs.   For UK Offshore Islands:

Where we Ship to ?:

We are currently only shipping to England, Scotland, Wales, NI and ROI. We are currently unable for logistical & customs reasons to ship to Channel Islands, Isle of Man or any Isles off mainland GB. All we can suggest is that you might be able to have the Order shipped to GB and from the there get it shipped on to your own address if it is one of the destinations that we currently do not ship to. BREXIT:

Brexit will have no financial impact on our GB customers once your Order is less than £135.

There will be No Vat on Imports, No Customs Charges, No extra or hidden charges once your Total Order is less than £135.  We will remind you again about this at the Checkout stage before you complete (pay) for your Order.  For further details please see our Brexit section here.


Troubleshooting Guide

Troubleshooting Guide


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