This page answers the 11 questions that come up most often before buying or fitting a kitchen sink: tap holes, reversible drainers, waste kits, worktop order, fixing hardware and plumbing. Each answer is short by design. For the bigger topics, sizing, bowl configuration and mounting style, the dedicated guides linked throughout go into full detail.

How many tap holes does a standard kitchen sink have?

Most inset kitchen sinks have 1 or 2 pre-drilled tap holes, with 1 hole covering a standard mixer tap and a second, smaller hole reserved for an accessory like a soap dispenser or filtered water tap. RUMO's 9050A, 10050A and Elite Silver ship with 2 pre-drilled holes as standard. Undermount sinks generally have no pre-drilled tap holes at all, since the tap mounts to the worktop rather than the sink itself.

Can you buy a kitchen sink without pre-drilled tap holes?

Yes, undermount sinks are typically sold without pre-drilled tap holes, because the tap is fitted through the worktop above rather than through the sink deck. RUMO's undermount range, including the 5045, 6045, 6046, 6744 and 8044, follows this pattern.

What does "fully reversible" mean on a kitchen sink listing?

"Fully reversible" means the drainboard or half bowl can be installed on either the left or right side of the main bowl, decided at the point of fitting rather than fixed at the factory. Almost every RUMO inset sink ships fully reversible, with fixing clips and a tap hole cover included so the installer can set the layout to match the kitchen rather than being locked to one configuration.

Should you order the sink or the worktop first?

Order the sink before the worktop is templated, especially for an undermount installation, because the fabricator needs the sink's exact dimensions and corner radius to cut a matching hole. For inset sinks the tolerance is more forgiving since the rim covers small gaps, but ordering the sink first still avoids a mismatch if you later switch models.

Is an undermount sink more expensive to fit than inset?

Yes, undermount installation generally costs more than inset, because it needs a solid worktop cut and polished to a finished edge rather than a straightforward cut-out with a resting lip. The undermount vs inset comparison breaks down the cost and worktop differences between the two in full.

Does a reversible drainer sink come pre-set to one side?

No, a reversible drainer sink ships unset, with the installer choosing left or right orientation at the point of fitting rather than the factory fixing it in advance. Every RUMO inset sink with a drainer follows this format.

Can you reuse an old waste kit with a new kitchen sink?

Generally no, because a waste kit is sized to match its own sink's waste hole diameter and basket strainer, and an old kit may not seal correctly against a new bowl even if it looks like a similar fit. RUMO ships every sink with its own matched waste kit rather than expecting one to be reused from the old installation.

Does a kitchen sink come with a cutout template?

RUMO currently publishes cutout dimensions on each product page rather than shipping a printable physical template; a downloadable template for each model is in development. Give the exact cutout measurements from the product page to your worktop fabricator ahead of installation.

Are fixing clips included with every RUMO kitchen sink?

Yes, every RUMO inset sink ships with fixing clips and a tap hole cover as standard, alongside the waste kit. Undermount sinks fix differently, using brackets and adhesive from below rather than clips through the worktop, so the fixing hardware for that range is bracket-based rather than clip-based.

What's the minimum worktop thickness for an undermount sink?

There's no single minimum that applies across every material: an undermount sink needs a solid, machinable worktop such as quartz, granite or solid wood, typically 20-30mm thick, rather than a hollow chipboard-core laminate at any thickness. A solid (non-hollow) laminate can sometimes work, but a standard chipboard-core laminate worktop isn't suitable for undermount fitting regardless of how thick it is.

Can a kitchen sink and dishwasher share the same plumbing run?

Yes, a dishwasher typically connects into the sink's own waste run through an appliance outlet on the trap, rather than needing a separate plumbing line. Four RUMO waste kits, Echo Silver, Essence Coruna, 8650 and Elite Silver, include this appliance outlet as standard.

Browse RUMO kitchen sinks for the full 20-model range across undermount and inset styles.