The UK’s longest established cylinder
exchange service from ELGA Process
Water is now available online. Users
can purchase and redeem SDI
vouchers 24/7 and qualify for special
online only rates at
www.elgaprocesswater.co.uk/sd
SDI (Service Deionisation) is a
flexible, simple and sustainable way to
get high quality purified water (up to
18.2M) delivered at a flow rate to suit
the application. Users can purchase
single pre-paid exchanges or voucher
books, or use SDI Inclusive, which
provides all the benefits of SDI
without the capital costs.

ELGA Process Water then supplies
a cylinder containing mixed bed ion
exchange resins, which is simply
connected to a tap to produce high
purity deionised water.When the
cylinder is exhausted, users redeem
an exchange voucher and a replacement
cylinder is delivered and the
exhausted cylinder collected.